This looks interesting:

http://oss.segetech.com/bugzilla-svn-wiki.html

It sounds a lot like part of my idea for a QA site.

Allows bug reports, wiki documents, and commit messages to reference each other, by creating hyperlinks based on the identifiers:

• BugID:
• VCS:
• Wiki:

So a wiki page can reference a bug report and vice versa, a commit log can reference bug numbers or requirements, etc. and it’s all recorded in a mailing list (mailman) archive.

I’d work on smoother integration, as well as integration with a task application, and tests.