I am probably wrong on this calculation, but willing to take a stab at what could be.
Google announced its Compute Engine offering this morning.
A Genome calculation with 10,000 cores was used as a demo. If you use an 8 core Intel Xeon with dual processors this is 625 servers.
Urs Hoelzle was presenting that there are 771,886 cores ready to run a Google Compute Engine job.
Here is a the calculation executed with 600K cores with refreshes in seconds vs. 10 minutes for the 10,000 core system.
So how many servers would 600K cores be? If you assume 8 core processors (I was going to assume 10 core processors, but backed off to 8). The following is pricing info.
How many servers could this be? 600,000 Cores/16 cores/server = 37,500 servers. (assume a virtual core does map to a physical core, note this is not always true) Assume 350 Watts per server ( 2 processors, 64 GB more of RAM, 2 HD) is 13.125MW of IT power with a PUE of 1.12 you get to 15MW overall data center power consumption
600K cores may seem big. But, thinking about 37,500 servers and 15MW of power is really impressive at least to the data center geeks. Oh yeh, there 771,886 cores available which is 48,242 servers, 16.9 MW of IT and 18.9 MW of data center power.
It is impressive to think one whole 20MW of data center capacity is available on demand for a Google Compute Engine job. Keep in mind this what is available, not the total capacity and being consumed.