My brother's just written a simple painting program for his TellyMate Shield.
I had a play, and came up with some fine art...
(They're not my hands, by the way - my nails weren't made for photography)
Personally, I think it beats anything done on an iPhone
, hands down.
It uses 6 buttons for up/down/left/right and paint/shift
Here's a link to the Batsocks Paint Sketch
. It can also be found on the TellyMate Shield page
[edit: I forgot to add a link to the 6 button shield
that I'm using in the picture above - It's due to be released in the next couple of days]