I was just talking to Daniel about this Access wiki site, that's started and moderated by the Access community: www.utteraccess.com/.../Main_Page

To be honest, for me I started to wiki on the TN wiki ! This is the first wiki that give me the taste to write stuff and to share. (Time is precious, and before contributing some times you always weight the pro&con of it, other place I go from time to time are just forums)

Before I used TechNet Wiki, I used SQLServerPedia: http://sqlserverpedia.com/

Truthfully, they ended up deciding that all their visitors preferred staying on their own blogs (what Tom talked about as a fear this week), and so they ended up feeding to all their top community folks' blogs: pulse.sqlserverpedia.com/blog

Well, if I'm allowed to mention representative articles, I'd sure like to plug social.technet.microsoft.com/.../7341.which-features-do-i-need-to-activate-in-sharepoint-2010-en-us.aspx and social.technet.microsoft.com/.../7926.sharepoint-2010-tips-for-dealing-with-performance-issues.aspx

nice job