For those of use using Trac for online projects and wiki-type functionality, and live in a visual studio world, you've got to check out Devja Vu's Visual Studio plug in.
http://vstrac.devjavu.com/
Its only in a Beta 1 state, but looks good enough to try out! You can too, grab it here on the SourceForge site:
http://sourceforge.net/project/showfiles.php?group_id=214927&package_id=259175