I'm doing some Facebook development, using the PHP client library. I've been absolutely boggled by the lack of documentation. I mean, maybe I'm just missing it, but... nothing for the PHP client library at all. And the way they treat some development issues as trivial reminds me of professors leaving the really difficult problems as "an exercise for the student".
So I'm going to document my problems and solutions here on my website. I assume you're already familiar with web development in general, so you should have a good grasp of HTML and whatever client you're using. I'm a PHP programmer, so that's what I'll deal with first.