diff --git a/docs/Haiku-doc.css b/docs/Haiku-doc.css
index 6a166540cb..51da22d9e8 100644
--- a/docs/Haiku-doc.css
+++ b/docs/Haiku-doc.css
@@ -122,7 +122,7 @@ div.bottomnav p {
 	border-style: dotted;
 	border-width: thin;
 	border-color: #dcdcdc;
-	padding: 15px 15px 15px 80px;
+	padding: 0px 15px 0px 80px;
 	margin-bottom: 15px;
 	margin-top: 15px;
 	min-height: 32px;
diff --git a/docs/userguide/en/applications.html b/docs/userguide/en/applications.html
index 9291537ce6..1ce642d215 100644
--- a/docs/userguide/en/applications.html
+++ b/docs/userguide/en/applications.html
@@ -5,7 +5,7 @@
 <head>
 <!-- 
  *
- * Copyright 2008, Haiku. All rights reserved.
+ * Copyright 2008-2009, Haiku. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -78,7 +78,7 @@ Otherwise, uninstalling is simply done by deleting the application's folder.</p>
 	<tr><td style="width:24px;"><img src="../images/apps-images/diskprobe-icon_16.png" alt="icon" width="16" height="16" /></td><td><a href="applications/apps-diskprobe.html">DiskProbe</a></td><td>&#160;</td>
 		<td valign="top">A HEX editor for files and devices.</td></tr>
 	<tr><td style="width:24px;"><img src="../images/apps-images/diskusage-icon_16.png" alt="icon" width="16" height="16" /></td><td><a href="applications/apps-diskusage.html">DiskUsage</a></td><td>&#160;</td>
-		<td valign="top"><span style="color:silver">A tool to visualize a disk's memory usage. [<i>still missing</i>]</span></td></tr>
+		<td valign="top">A tool to visualize a disk's memory usage.</td></tr>
 	<tr><td style="width:24px;"><img src="../images/apps-images/drivesetup-icon_16.png" alt="icon" width="16" height="16" /></td><td><a href="applications/apps-drivesetup.html">DriveSetup</a></td><td>&#160;</td>
 		<td valign="top"><span style="color:silver">A harddisk partitioning tool. [<i>still missing</i>]</span></td></tr>
 	<tr><td style="width:24px;"><img src="../images/apps-images/expander-icon_16.png" alt="icon" width="16" height="16" /></td><td><a href="applications/apps-expander.html">Expander</a></td><td>&#160;</td>
diff --git a/docs/userguide/en/applications/apps-diskprobe.html b/docs/userguide/en/applications/apps-diskprobe.html
index 981b7f27cf..afb7cd94ce 100644
--- a/docs/userguide/en/applications/apps-diskprobe.html
+++ b/docs/userguide/en/applications/apps-diskprobe.html
@@ -46,7 +46,7 @@ width="64" height="64" />DiskProbe</h1>
 <p>DiskProbe is a HEX editor to view and alter data of a file or on a device on a byte-level. It's a very low-level tool and has therefore the potential to really mess things up if you're not careful!</p>
 <div class="box-warning">Always work with the backup of a file and be extra careful when working directly on a device.</div>
 <p>When starting DiskProbe you'll first be asked for the file or the device to work on. After that you are presented with this interface:</p>
-</p><p><img id="diskprobe" src="../../images/apps-images/diskprobe.png" alt="diskprobe.png" width="559" height="232"/></p>
+</p><p><img id="diskprobe" src="../../images/apps-images/diskprobe.png" alt="diskprobe.png" width="559" height="232" /></p>
 <p>The main view shows always one block of data, the size of which can be adjusted with <span class="menu">View | BlockSize</span>. To the left is the offset to the start of the block, in the middle the data as HEX values and to the right the same as ASCII symbols.<br />
 You can move from block to block with the slider above or with <span class="key">ALT</span>&#160;<span class="key">&larr;</span> and <span class="key">ALT</span>&#160;<span class="key">&rarr;</span> and switch between the HEX and ASCII columns with <span class="key">TAB</span>.</p>
 <p><span class="menu">Block | Selection</span> will not only show the selection with different endianess (and different radix), it will also interprete the selection as a block offset that you can jump to. It will be greyed out if the position is outside of the file/device.<br />
diff --git a/docs/userguide/en/applications/apps-diskusage.html b/docs/userguide/en/applications/apps-diskusage.html
index 68baafdf15..07bfeff995 100644
--- a/docs/userguide/en/applications/apps-diskusage.html
+++ b/docs/userguide/en/applications/apps-diskusage.html
@@ -5,7 +5,7 @@
 <head>
 <!-- 
  *
- * Copyright 2008, Haiku. All rights reserved.
+ * Copyright 2009, Haiku. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -44,10 +44,24 @@ width="64" height="64" />DiskUsage</h1>
 <tr><td>Settings:</td><td></td><td><span class="path">~/config/settings/DiskUsage</span></td></tr>
 </table>
 
-<p>Documentation is still missing. If you want to work on it, please announce it on the <a href="http://www.freelists.org/list/haiku-doc">Documentation mailing list</a> to avoid duplication.</p>
+<p>DiskUsage shows graphically how the space on your volumes is utilized.<br />
+A useful tool to answer the question, "<i>Where has all my disk space gone?</i>".</p>
+<p><img id="diskusage" src="../../images/apps-images/diskusage.png" alt="diskusage.png" width="412" height="484" /></p>
+<p>The concentric circles represent different levels in the file system hierarchy. Above, the circle in the center represents the <span class="path">/boot/home/</span> folder. Each segment of the ring immediately outside that circle is a file or folder under <span class="path">/boot/home/</span>. Every segment farther outside brings you one level deeper in the file hierarchy. You may have to resize the window to accommodate very deep folders.</p>
+<p>Above the graphic is a drop-down menu that lets you switch between all mounted volumes. Before the disk usage of a volume can be displayed, it has to be scanned. You can examine another volume while that scan is done in the background.</p>
+<div class="box-info"><ul>
+<li>If the graphical representation of a file or folder comprises less than about 2° of a circle, it is excluded from the display.</li>
+<li>The number of files that's reported for a folder includes files in subfolders too. A folder counts as a file.</li>
+<li>DiskUsage ignores symbolic links.</li>
+</ul></div>
+<p>As you move the mouse over a segment, information about that file or folder appears in the status bar at the bottom.</p>
+<p>Right-clicking a segment offers a context menu to <span class="menu">Get Info</span>, <span class="menu">Open</span> (with Tracker), <span class="menu">Open With</span> another suitable application or <span class="menu">Rescan</span> that particular folder.<br />
+Left-clicking a segment makes that file/folder the center circle.<br />
+Left-clicking the center circle moves you up one level.</p>
+<p>You can drag files and folders from DiskUsage to other applications or to the Desktop or other Tracker windows for copying. Vice versa, dropped volumes and folders on DiskUsage's window will zoom directly to them, making them the new center circle.</p>
 
 </div>
-<!--
+
 <div class="bottomnav">
 	<p>
 		<a href="../applications.html">Applications</a>
@@ -57,6 +71,6 @@ width="64" height="64" />DiskUsage</h1>
 		Next: <a href="apps-drivesetup.html">DriveSetup</a>
 	</p>
 </div>
--->
+
 </body>
 </html>
diff --git a/docs/userguide/images/apps-images/diskusage.png b/docs/userguide/images/apps-images/diskusage.png
new file mode 100644
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