I've been following Stanford's Paul Hegarty lecture on iOS development on iTunesU. What a magnificent opportunity, and excellent lectures! There is practically limitless amount of material out there, only a matter of finding time to view it all.
At some point I got fidgety, and sketched this pastel of the lecturer, in a few minutes rather than sit still and pay attention to the eminently useful discussion of the Xcode Debugger.
Pastel on pink paper, approx. 26 x 36 cm (japanese B5 size); photographed,
appropriately enough, with the iPhone 3.