Wow...that is Fantastic!
It is pretty amazing. About 10% of that is my profit margin. But that's not bad for a few hours work playing with Photoshop.
The only marketing I've done is the links I've posted on FR (some of which have been pulled) and posting this on my blog and Twitter. The bulk of the orders have come through CafePress.
It doesn't pay the mortgage. But it does pay for my Internet addiction.