Tried doing something with the Nexus 7 I got for Christmas and a Jot Classic stylus. I have to say the Jot is a LOT easier to use than the usual squishy styluses, but I'm not sure the Nexus 7 is capable of being completely precise even with that. Oh well, it's decent enough for sketching, even if it probably isn't going to work out for completed stuff. The other problem being that Sketchbook Express only gives three layers to work with, which is contrary to how I do digital art normally. Guess I'll eventually want to pony up for the Pro version.