The folks at Akiba PC Hotline! have delidded AMD’s latest APU processor, Kaveri (be sure to check out our Kaveri review if you haven’t yet) using a standard razor blade. It looks like a fairly straight forward process, as long as you don’t chop off a diode like these guys did. OOPS!
AMD is using standard heatsink paste between the die and the heat plate, which is what they have been doing for some time now. While this doesn’t provide the same degree of heat transfer and durability as solder, it keeps costs low. Intel does this on most of their product lineup now, starting with Ivy Bridge (although their Extreme series appear to be using solder)
It should be interesting to see if people can improve heat transfer by delidding and using different methods to improve heat transfer. If you have done this, let us know!