Technically, so does Heroku. CloudFoundry does offer Java support, which is a bit different.
I am interested to see how it looks once it gets out of beta. I am betting it will be a solid platform, but after seeing the demo a few months ago at RubyConf, it did feel like a model I had seen before.
No worries and I am good friends with the Heroku guys and I fully give them props for lots of the pioneering ideas in this space.
This project means to take it further though and be one everyone's cloud operating system, the Linux of cloud OS's if you will. It will live or die based on the open source can build around it. I fully intend to try to build this community and nurture it so this project flourishes. The personal PaaS angle is what I'm most excited about. Whatch for my technical blog posts tomorrow after I get some rest for more info...
As someone who would like to give Heroku a bit of a twisting sometimes, I'm all for it (even if that's all it is). Having a company like VMware offer to run my Rack and Node apps side by side would be useful.
