Over at ConceptArt.Org they have a contest called Panel Of The Week. It's a recurring contest (About monthly in spite of it's name) where you are given a theme and are asked to do between 2 and 6 pages of comic art on that theme. It's a fun idea and seems like a great way to participate in the community and to try out new techniques and materials. I would encourage eveyone to participate. The current theme is "The REALLY bad date..."