I think I'm going to get a Phenom II X2 955 and a cheap board.
I looked into it and bulldozer is almost certainly going to require a new chipset, not that I'm actually expecting anything earth shattering from it honestly. My plan was to go to SB, then buy a s775 DDR3 board pass my kind of lame e2160 @ 2.93 to my wife's machine and sell the other parts off for a few peanuts.
I hemmed and hawed about getting a new s775 + DDR3 board and moving the chip over...but then I'd be down while setting up the overclock again for too long of a time. So I thought of buying a new chip and selling the old stuff all...but I saw that s775 chips are still expensive and the DDR3 platforms for it are not to great. And if I was going to buy a new chip I'd get way more bang on the low end going AMD. So I think I'm going to dig up a little money for a small upgrade to sit on for awhile with the P II X2.