Today's Slashdot story finally spurred me to join the Distributed Proofreaders project. Not that I have lots of time for it, but I hope to contribute in my spare moments (especially on books that have a bit of Latin and Greek in them). It's a worthy cause.
BTW, it turns out that they use Jabber for a lot of their communications. In the main PGDP chatroom (pgdp@conference.jabber.org), pourlean (one of the project admins) reports that using Jabber has really helped their productivity. Perhaps a case study is in order...