According to current plans, Phenom II X4 in both AM2 DDR2 and upcoming AM3 DDR3 iteration will stop at 3.0GHz core clock, at least until Q3 2009.

We believe that TDP is to be blamed, as this time AMD doesn’t want to go over 125W TDP. We are not sure that Nehalems are selling like hot cakes due to the necessity of expensive platform upgrades and many are simply reluctant to make a huge investment in a year of economic crisis. Nehalem at 3.2GHz will end up faster than Phenom II X4 940, but at the same time the CPU itself will cost almost three times the price of a 3GHz Phenom II.   

AMD will launch Phenom II X4 940 at 3.0GHz and a total of 8 MB of cache on the 8th of January on the first day of CES, and the one called Phenom II X4 945 at the same 3.0GHz core clock, but with DDR3 memory support will show its face in Q2 2009. These two are currently the fastest CPUs planned until Q3 09; but this can easily change, as companies' roadmaps are about as stable as the world economy.

Both Phenom II 940 and 945 should be able to reach 3.5 to 3.8GHz if not even faster on air, with a nice cooler and with water probably even more; and therefore, they might be very attractive for overclockers. The best part is that they will be cheap.