Based on user feedback, we added a few highly requested features to the project hosting wiki on Google Code.

To improve navigation from one wiki page to another, we added side navigation across wiki pages (e.g doctype docs). You can add a 'Wiki sidebar' by specifying the wiki file that describes your side navigation in the Administration tab under Wiki settings.
To help navigate a wiki page, we added the ability to add a generated table of contents. To add a table of contents, just copy the following syntax to your wiki page.
<wiki:toc max_depth="1" />
Finally, to improve the style of your wiki pages we have added some html support. For more information on what html is supported, take a look at the documentation.

As always, we look forward to your feedback.