I might add pierpoint.com to that list. A few hours ago, I got an email from them asking me if I was interested in a job with my immediate previous employer (which is kind of a mu question to ask, as I'm so interested in that idea that I've actually secured a start date there in less than 2 weeks--let's just say that I really liked it there and regret leaving).

If the guy there had done anything more than scrape LinkedIn for .NET stuff (which I can do and have done), he'd know that I would not need assistance in returning to $FORMER_EMPLOYER.