David Richardson has created a multiple-part tutorial for modeling a mech in ZBrush.
Ben Mauro - ZBrush for Environments
Ben Mauro has released a free 3D environment design tutorial using ZBrush, Keyshot and Photoshop.
Ben Mauro - Yukon Pit Crew: Part 1
Ben Mauro has posted a ZBrush video tutorial, focusing on the development of his Yukon Pit Crew project.
ZBrush Halloween Contest 2013
Pixologic are hosting a ZBrush Halloween contest, with prizes like a MakerBot 3D Printer or a Wacom 13" HD Cintiq.