Playing with sculptis lately... and liking it so far. Its very simple but it feels a little more natural the way the mesh reacts.
Here are a few I did over the weekend about 1.5hours each - no refrence (next time I will use ref) just trying to get the feel for it. For the first couple tries I imported some exagerated head shapes from 3ds and the last one is straight from a sphere:
Kinda wierd that it doesn't use quads... and will inevitably need a re-topo coming out - but if they can make it work in Zbrush or have some kinda 'auto-quad-ing'...cool.