Started playing with zbrush a few days ago, started doing this skull test to get used to the program.
This is what I have so far...don't mind the horns, they are bad.
(click for big image)
[Blocked Image: http://evillair.net/e107_plugins/autogallery/Gallery/wip/th_ZBrush_SkullTest_01.jpg]
Going to continue working on it for a little while, see what comes of it.