Dirk - It's a major shame that the software isn't able to benefit from GPU calculations. I think there was a group in Germany looking at it.
Also, whilst the AMD chips are pretty good at TDP, they are unfortunately, significantly slower (I believe they're compiled with Intel compiler which could explain things - I've seen stories around the web that the Intel compilers cripple speeds on non Intel chips).

Some of the fire safety systems for data centres are pretty cool - Maybe crunchers should begin to consider how to protect all the crunchers they may have? ;)