This is a pretty simple little sketch -- my first try at Paper 53. I just got my first iPad for my birthday, after dithering about getting one for at least a year. I downloaded Paper 53 (free) yesterday, then shelled out a grand total of $9 for the add-on tools and palette and started playing.
I also bought a neat stylus/brush that I'd seen in an art supply catalog recently. I got mine through Amazon and couldn't be more pleased. It's a Sensu, made by Princeton Brush Co. The brush isn't essential, but it does give a reasonably good feel of actually painting. The only thing I'd like would be a way to control the size of the stroke, but you just get a single weight line -- good for filling in some color, but not quite as sensitive as a real brush. This is what the Sensu looks like -- it's like a travel brush, with the brush stored inside the handle.
Although there is a built-in palette with about 15-20 fixed colors, the Color Mixer add-on is a worthwhile addition. It was only a couple of dollars and it works much like the color controls in Photoshop -- slider bars let you control the hue, the saturation, and the value, so you have almost unlimited choices.
All in all, a fun app and the iPad is fantastic. Can't believe it took me so long to take this step!!