I'm boardin in photoshop at the moment and after work today had a prick around with some of the pencil brushes I downloaded from the internet. Don't blow it up, canvas is a bit too big, it's really messy, and I only spent an hour on it so it's as short on detail as it could be. Probably looks better if you just squint at it!
Got a comment there from a Romanian artist called Einah, his blog is worth the trip.