I've been playing with this for a couple of days now on EC2 - I was able to spin up a minimal stack in a few hours from nothing and just keep adding nodes to ma

I've been playing with this for a couple of days now on EC2 - I was able to spin up a minimal stack in a few hours from nothing and just keep adding nodes to make it keep being able to take more traffic - it's pretty sweet. I've packaged a couple of EC2 AMIs (32 and 64 bit versions) that I'll make public in a day or two and a script that uses Net::SSH to automate most of the spinning process. I just finished the video for a screencast on this and I went from zero to a 9 node cluster that could serve 300 req/sec on a non-cached Rails app in development mode, all in about 12 minutes. It really is fun to play with - now to find a reason to use it...