Well, here’s some info for you:
1) CURRENT Intel silicon can scale to over 4 GHz right now, they’re holding back waiting for AMD
2) SLI isn’t a function of the chipset, it’s a function of the cards. Remember that.
3) SATA2 won’t be out for a while, absolutely zero need or want for it except for TCQ replacing NCQ, that’ll be its only advantage period. Don’t worry about SATA versions: even ATA/66 is overkill for a single disk so far, and aerial densities have hit a wall for the moment.
4) Current sockets support AMD dual core.