Bungee integrates with the power of Amazon EC2
Along similar lines, Bungee is now allowing developers to deploy Bungee-powered applications on top of their own server, something called Bunge Application Server, which uses VMWare technology. Both of these are going to be available in June.
I don't believe either one of these lets you actually host the IDE, so you'll still be doing all of your development on Bungee's servers, but with the new deploy options integrated directly into the IDE, it should be very easy to take your creation and use EC2 or your own server. I think it's a great move that keeps Bungee's core assets (like the IDE and platform) at the forefront and allows them to use other services to actually scale the applications. As Bungee gets more popular I don't know if they wanted to eat the cost of storing all those apps themselves. Now they can keep on trucking with Amazon as the hardware backbone.