Ask YC (EC2 Users): how do you actually manage your EC2 platform?

We run our online MMORPG, Star Sonata, on it. We just use the console since we're not really changing our instances much. We just use it because it has great ping times and bandwidth and the largest high-CPU instance is just perfect for our server.

own management software, using boto (http://code.google.com/p/boto/)

boto and Elasticfox.