If you’re interested in a bit of a weekend challenge, we’re currently hosting a small PHP coding competition at one of the IRC channels I’m active in. The challenge’s deadline is this sunday (10th of August, 2008) at midnight (if you’re in another timezone, just use your own sunday’s midnight), but the challenge should always prove interesting later too.
If you’re interested in trying to solve labyrinths with the smallest amount of source code, this might be for you!