There are a few contests currently running. If you have some free time, they are worth checking out. Time is running out, so don’t wait too long.
Sandbox Designs Competition (details here)
WordPress theme competition utilizing only CSS to modify the Sandbox theme. Contest ends July 29, 2007 with awards standing at $1650(first), $750(second), $450(third), $300(fourth) and three runners-up with $50 each. If more sponsors join, the prize money could go up.
WordPress Plugin Competition 2.0 (details here)
Weblog Tools Collection is running a WordPress plugin competition. Details are still being worked out, but the competition is set to end on July 21, 2007.
Widget Contest (details here)
Freewebs and Widgetbox announces a widget contest with a Grand Prize of $1000. Entries must be submitted by July 5, 2007. The winner will be announced at WidgetCon on July 11.