I've asked Heroku employees about that, and they said that their infrastructure would not be the best for Comet long-polling applications. I'm sure they've developed everything assuming that requests would be short and if they were long then something is wrong.

Also, this post shows someone that has gotten taken by how easy deployment is on Heroku. It's good but the article mentions that the author took another look "yesterday". Still riding that high.

Please stop using emotionally charged words like "awesome" to describe something. It's pointless but then again I'm referring to an article that calls me names. Heh.

"You can certainly run Sinatra on Heroku, not just rails."

More to the point, you can run any Rack-based app or app framework.