I read today from the Amazon blog that Amazon has announce the "Amazon Elastic MapReduce". Run MapReduce on the Amazon Cloud! WOW.
It seems that data archives and the astronomical community should look into this. I know that efforts live VOSpace or VOPipe (just heard about this today and I am not sure what it is) could really be looking at what amazon is doing and perhaps at the how as well.
I have proposed that STScI and MAST in particular pays attention to these technologies and I have introduced some Amazon folks to the MAST Archive Team, but I have not heard back on the efforts.