Hmm, I dunno.
It doesn't require authentication (meaning it doesn't read your profile info), so I'm not sure how to do that. I'll have to read up a bit more on the FB API. But whatever I add, I have to be careful not to cause issues when the r/c calc site is viewed directly from my server.
Edit: I'm not too sure on this because the application was made under my own account, but on
this page is there an "Add to my page" button on the left? Maybe this will work? Let me know.