I think you pointed it out, it's the cost. I love Heroku too, however, I can definitely see how Heroku can be much more expensive in the long run. 37signals jus

I think you pointed it out, it's the cost. I love Heroku too, however, I can definitely see how Heroku can be much more expensive in the long run. 37signals just recently showed how their recent RAM addition was just a tiny fraction of what they would have payed at Amazon.