It is too early to see if this will live up to promises... but way cool if it does!!!
http://msdnwiki.microsoft.com/en-us/mtpswiki/default.aspx
Info from the site:
"Welcome to the MSDN Wiki Beta! On this site you can add content to VS 2005 documentation topics and edit contributions from other users. Our goal is to extend the documentation with code examples, tips and tricks, and other information that you add. To learn more about this site, check out our FAQ. To report bugs, make suggestions, and view information about our future plans, visit the MSDN Wiki Connect Workspace,
To get started, click on one of the library nodes on the left (Visual Studio or .NET Framework SDK) and scroll down to the bottom of any documentation topic.
Look for "add content" or "edit" under the green "Community Content" area."