Edit 2/1/09 - I posted up a new SB here:
Rebecca Kimmel's Sketchbook 3.0
'Ello ConceptArt peoples
I have another thread here with some of the same work,
but thought I would start a Sketchbook as well to record
my visual and astrological journey through time and...
whatever, here are some 15 Minute Sketches from the
15 MS thread on CGTalk:
EDIT: This stuff sucks, please go to the back of the thread to see more recent work.
Many of these earlier links are dead.