Took me a while to find this thread.
Anyway i've been fooling around with Facebook code and managed to code a half-decent app

(Deepu, Hush now! :-p ) Got a few users too so that was nice.
Got ideas for other apps though coding them could take some time so going about it slowly. I'm severely cramped by no net connection at home and the 1.5hr journey to and fro everyday. What a waste of my time
I barely know PHP/MYSQL and get around by learning it/ asking ppl like Deepu and others to help. its amazing how willing people are to help and give their time and that too for free!
Teaching myself OpenSocial programming too. Rather shocking that i'm learning all this coding stuff considering i absolutely abhorred it during my 2years in IT
Am now trying to understand the difference between Joomla and Pligg so would appreciate somebody explaining that