I take issue with the offhanded remark that Heroku is cheaper. The whole point of Engine Yard for me is that it is a straight markup on AWS services, and you can run whatever you damn well please on your instances. With Heroku A and B might be free, and C is an add-on costing an arm and a leg, even though it's all open source software requiring the same amount of resources.<p>The way I see it, Heroku is ideal when you are small, Engine Yard is good up until medium size, but if you ever hit real scale, the overhead is not at all worth the benefit.