Go for a S939 X2, you'll be able to use the PC-3200 memory from your current system, you won't have that option if you go LGA775 (no DDR1 support AFAIK).
Meh... AMD was ramped up production on AM2 back in Feb/Mar. They spent a lot of time making parts so there wouldn't be a shortage. AFAIK, Intel has only recently begun to make Core Duo's (desktop). Also, Core Duo production is like less than 35%.
But who knows, there may be plenty of them at launch. But when u consider the price of those bad boys, I wouldn't count on it.
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