Thanks for the extra info! I'm doing a lot of work now with python on EC2 and the reddit write ups + presentations have been a huge help. Thanks again.
Duly noted. I started with this talk and have been using it as a guide to scaling edge cases with python as well as AWS. I thought raid10 was overkill before I started digging into the postgres/EBS mess, but now it seem almost routine enough that Amazon should have it as a configuration option.