OK, a lot of people are saying this is bad news for developers. They may be right but really, one of the good things about Heroku is that there is no lockin: seriously, it is simple to take any rack-based web app off of Heroku and other hosting options like self-managed EC2s, VPSs, etc.
I suspect that Saleforce will at least try hard to not lock the boat.
I suspect that Saleforce will at least try hard to not lock the boat.