There does seem to be a huge rush on them since my post! Stock seemed constant during the two days it took between my ordering their, and my posting here (had been a busy couple of days for me).
Is the 144 much worse, though? It's cheaper, and while rated 200MHz lower out of the box, shouldn't it also O/C like a mad thing? At that price, even hitting 2.4 or 2.5GHz would make it a tremendous value-for-money S939 chip!
Edit: Gah, there's already a thread about this!
http://forums.hexus.net/showthread.php?t=61484