This website deserves a back-link:
Impossibility.org
It’s absolutely spitting out awesome unregistered domains – John Forsythe, you rock!
I wish this tool was available years ago, with all the stupid domain names I’ve come up with through the years… 😀
… stupidfew.com … stupidmaybe.com … stupidspam.com … stupidbuildings.com … stupidtalking … (this is even more time-consuming that Facebook 😉 )
… anythingfacebook.com … (I can’t stop! )