It's my Featured Writer picture from Starcity Games, mspaint-edited to a ninja, part of a tradition of bad edits. I was basically barred from posting on the forums at all, from daring to comment on another (now excruciatingly popular) writers' work. This led to some speculation amongst my readers that I was kicked off the site or banned due to some other effect. When I was finally permitted to post once more (by the magnanimous directive of the criticized writer), I edited my picture appropriately, to indicate my stealthy posting habits.
Depressing and stupid stuff, really. I'd change it, I suppose, but I can't find anything really cool. I really liked my old blade dancer pic I had on the WotC boards, but since leaving those behind me, I just can't bring myself to use their art.