I normally refer people to http://distributedcomputing.info/index.html to see what is up in distributed computing, but I just ran across one cruncher's post with his views on the current distributed computing projects.

http://www.hyper.net/dc-howto.html

Titled 'How-To: Join Distributed Computing projects that benefit humanity' it links to numerous threads and posts in project forums that I had never read (but should have).

Disclaimer: He even quotes part of one of my own posts! I think that he is extremely insightful.
mycrofth