Scalr
From CloudWiki
About
Scalr is a fully redundant, self-curing and self-scaling hosting environment utilizing Amazon EC2. The company behind Scalr, Intridea, is a Ruby on Rails development firm that offers a couple of software services based on EC2.
Links
http://code.google.com/p/scalr/
http://aws.typepad.com/aws/2008/05/intridea-rolls.html
