Yesterday (June 9th, 2012) I participated Heroku Junior Camp at Rakuten as a staff member. The workshop is designed for Junior Programmers to introduce software development using Heroku. We provided a large company meeting room and I was a beer bash master and drunk as usual ;-)
There were three groups, Java, PHP, and Ruby. I joined the PHP group led by Ando san, who is well known PHP hacker and the author of Candycane https://github.com/yandod/candycane
He introduce to make a Facebook application using Heroku. His presentation in Japanese can be found in his blog. http://blog.candycane.jp/archives/1496
I followed his explanation and click them. What you need is 1) github account, 2) heroku account, 3) Facebook account, that's it. You could make a Facebook application without any coding. very simple.
The application which I made in Five minutes is the following. It is a tutorial of Facebook application.
Enjoy building your own Facebook application.
Links: Heroku Junior Camp http://kokucheese.com/event/index/37851/