It would seem that to write a facebook app in Java, I would require my own webserver, complete with J2EE. Is this true? Cause that'd be no fun.. Would I still need my own server if I wrote the app in PHP? Or will facebook nice enough to host my code?

First, PHP runs only on a web server.

I am not familiar with facebook, but did a little google searching, yielding:

http://www.google.com/search?hl=en&clien...

One of the clearer sites was:

http://wiki.developers.facebook.com/inde...

A couple of very nice links on that page indicated that a web server and J2EE are necessary. You *might* be able to use one of the 'free' web servers available on the internet, but I did not read that far.

You can use some online webserver. You may also contact a facebook application developer to help you out. Check websites like http://getafreelnacer.com/