Here's the newest tech from intel this processor (http://en.wikipedia.org/wiki/Westmere_(CPU)#Successor). The decent desktop version probably won't be out till next year but it seems it might be worth holding off for a little bit if you were thinking of getting one of the 45's. That is unless you really want to wait for Sandy Bridge (http://en.wikipedia.org/wiki/Intel_Sandy_Bridge_(microarchitecture)) or the equivelant tock version which is supposed to be 16nm ;D
Have you read any dates on releases?
Only that it'll be VERY late this year for the mobile solution and possibly the mainstream chips, that'll probably be 2.66GHz. Anything worthwhile for TG2 would be 2010, but there aren't any specific dates but I'd say about this time, maybe April, get it out before the 3rd quarter in the US, or 1st quarter in the UK.