(Update to Sketchbook thumbnail image...)
This is my first post on the site, starting with some sketchbook content.
Many of these below were done on the train ride to/from work (when I manage to not fall asleep first). I hadn't been drawing for a while at the start of this, and started again this past summer (2008).
(Images updated for resolution increase)
Added a couple painting exercises, using my new Cintiq-20WSX. The first two using Painter and the third in Photoshop: