Started with some thumbs in marker and brush pen. Then picked out one of the more interesting shapes to sketch out more with marker and pen. Since I plan to take this into zbrush I probably won't need a fully rendered illustration... but if I have time I will probably do it just for fun.
again, a big challenge for me was to stay loose with the thumbs and really flush out as many different ideas, thanks Grant, for keepin me straight ;)
It was a great process to go through and I've posted it so that I won't forget... and its been a while.