I know I've been promising it for a long time, but last night, I finally posted the update that I've been talking about forever. This update is located now on CodePlex (http://www.codeplex.com/cswiki) and includes:

• No more TopicSets. Topics are now parents of other topics.
• Topic structure navigation integrated into the breadcrumbs.
• Change history RSS feeds (hierarchial).
• Attachment and history thumbnails in the sidebar.
• Almost completely eliminated the use of the Uri object (can someone please test without full access permissions).

Unfortunately, Upgrading from previous versions of the CS-Wiki package is NOT supported. You'll have to do a few things manually.

1. Move your root and default topics (like /Sandbox/sanbox.topic.xml) to above the current folder. It should look like this:
   
   Sandbox.topic.xml
   Sandbox <dir>
   +-- <child>
   
2. Copy the <wikipermissions> element from the _namespace.xml file into the <topic> element in the topic.xml file.
3. Open all topics, and remove the ID="__" attribute from the XML. The new code uses the file name as the ID.
4. Lastly, in all of the default/parent topics, links to child topics need to start with "./", so format them to look like: "[[./Child]]".