I just noticed that the Power Collections project made it to the “Featured Sites” on GotDotNet. See http://www.gotdotnet.com/content/featuredsite/powercollections/default.aspx
For those who don’t know, Power Collections is a community open source library of advanced collection classes and algorithms. The project is co-sponsored by Microsoft. It has generated lots of good APIs (you can download a working library here) and lots of feedback for the BCL team on how to we should be designing our collections.
I would encourage anybody with a passion for collection libraries to get involved. Power Collections will influence the .NET Framework collections and so it would be great if Power Collections were influenced by the broader community.
You can find the specs of the APIs at http://www.wintellect.com/powercollections/spec.aspx
… and provide feedback at the forum http://www.wintellect.com/forum/main.asp?CAT_ID=7