Have seen a lot of fuss, recently, about Twitter, including this well laid out story on cnet.

Question to fellow recruiters and HR leaders: how have the results been (in terms of ROI and time put in) using Twitter to source (unlikely) and foster long-term relationships (more likely)?

I had to jump in on a discussion over on ERE about the number and 'quality' (such a subjective term) of people now available on the market due to layoffs and the recession.
Read the piece, originally by Dr. Sullivan on January 5th, and a variety of spirited responses including mine here.