I've been participating in Distributed Proofreaders for about a week now. It "provides a web-based method of easing the proofreading work associated with the digitization of Public Domain books into Project Gutenberg e-books. By breaking the work into individual pages many proofreaders can be working on the same book at the same time. This significantly speeds up the proofreading/e-book creation process." It's a lot like the auditing and data entry I did last year at Parexel, where I compared a scan of a form to the data, and entered corrections as necessary... except here, I can flip back and forth between the proofing and my email and LJ and sometimes read a ripping yarn as I proof it.
It's fun, and a little challenging. It's also resume material. Gotta love that.