David Richardson has created a multiple-part tutorial for modeling a mech in ZBrush.
Art for Games - Sculpting Realistic Braids Tutorial
Art for Games have a new free tutorial, this time on sculpting realistic braids in ZBrush.
Primate Anatomy - ZBrush Tutorial
Ben Mauro's foundation primate anatomy/sculpting tutorial for ZBrush has been released on the Badking website.
Ruan Ji - ZBrush Art
Check out some amazing modeling and texturing by ZBrush artist Ruan Ji.