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.
As always, we look forward to your feedback.
[NFGB] Link - from Google Code Blog