[computer-go] Pay-as-you-go cluster?

[Darren Cook]

For many of us a cluster is just not practical: even if we could afford
100 computers, where to put them, and how to meet the power
requirements. But if you have a scalable algorithm then it may be nice
to have 100 machines for just the couple of hours of a tournament.

If I've read the following correctly, you can get 100 1.75GHz computers
of power for 2 hours for a total of $20:
  http://www.amazon.com/gp/browse.html?node=201590011

Do I sound like their salesman? :-) Actually I'm just curious if there
is a catch (*), or if anyone is experimenting with this, or knows of
competitors.

Darren

*: My guess is that as it is aimed at web hosting they're not expecting
a CPU-bound application?