If your worried you could get a T7800, that's the same TDP and so on.
You might need a BIOS upgrade to support the 45nm chips, other than that it shouldn't be a problem.
I don't mean to sound idiotic, I just want to bring this to you guys.
I read somewhere that some motherboards will have trouble downclocking a processors FSB, given a mismatch (in my case the proc's FSB being higher than the motherboards).
According to gateway:http://support.gateway.com/s/Mobile/2008/GodzillaFX/4006258R/4006258Rsp2.shtml
My laptops motherboard caps out at 800MHz FSB, but the processors I'm looking at are all 1033 FSB. Now, I would have no problem letting the mobo downclock the proc, but I'm not sure if that's even possible!
Any insight would be awesome =P