I just read this part:
--in the traditional Northbridge location--isn't really mounted to anything. It's sort of just floating there, connected to the VRM heatsink via a heatpipe. Because upcoming Lynnfield based processes move virtually all of the historic Northbridge functionality, including PCI Express connectivity and a memory controller, onto the CPU die itself, there's no need for a Northbridge chip.
Not sure if that's a good thing or a bad thing. If what I read is right, then that i5 chip is going to be one roasting sob. I'm also wondering how good will oc if evrything is on die itself?