How to add invitations to your facebook app

We have spent the last 2 days to fix, improve, clean up the OnMyList facebook app. There is this new way of using FBML to do invitations. I figure it will help some other folks out as well. If you are looking to spread some viral on facebook, take a look at Facebook app invites with RoR.

BTW, we are using RubyonRails and Rfacebook.