I only started working with Rails about 6 months ago and was blown away by how easy it is to deploy apps. The whole set up literally took 5 minutes, and I didn't even know how to use git. I seriously considered their paid plan for a side project. But then I found myself reason "yea, I'm paying a premium for the elegant deployment flow and easy scalability. I'll use an extra dyno and turn it off at night to keep cost low. Maybe I use ferret first and then if thing picks up I set up an EC2 for Solr or Thinking Sphinx. Permanent storage? Well, I'll force my users to post picture somewhere else initially." So then I started looking at Linode and Slicehost and found that it's not that bad, especially with Passenger.

I'm a potential customer, I love their simple design and can't stop promoting Heroku to friends. I hope they succeed in solving those limitations and keep cost down in a reasonable range so that I can happily give them my money.