I agree - it's great to get started and get traction with an app but can become costly after a certain point. When I got to a point of needing several dynos, I went to Engine Yard which like Heroku takes care of all of the Amazon EC2 configuration.

Also, with deploy hooks at EY, I have command line deployment similar to Heroku's "git push heroku master" by using a specific command in your commit message 'git commit -am "[deploy myapp_production]" and then 'git push'.