Jeff Atwood has a post on an idea he had about contributing to the OSS ecosystem (he started the thread with "How To Advertise on Your Blog Without (Completely) Selling Out"). I have a post in the works on my thoughts on the idea (bottom-line : I *LOVE* the idea). But, head over there and let Jeff and I know which .NET projects you find useful and which projects you'd like to nominate to be the recipient(s) of the money we'd like to contribute.