Clone of Heroku? None I'm aware of. A bring-your-own PaaS? Many. I work with Cloudify myself: http://www.cloudifysource.org/
Nice things: It integrates with Chef/Puppet, allows built-in auto-scaling so it's cloud independent... has recipes for many applications and services ready to go: https://github.com/CloudifySource/cloudify-recipes
Drawbacks in my mind are that it's based off of Groovy which may or may not be helpful to some people. The other thing is that it doesn't have a direct method to do source/application deployment so you kind of have to roll your own via 'Custom Commands'+Groovy.
Nice things: It integrates with Chef/Puppet, allows built-in auto-scaling so it's cloud independent... has recipes for many applications and services ready to go: https://github.com/CloudifySource/cloudify-recipes
Drawbacks in my mind are that it's based off of Groovy which may or may not be helpful to some people. The other thing is that it doesn't have a direct method to do source/application deployment so you kind of have to roll your own via 'Custom Commands'+Groovy.