David Richardson has created a multiple-part tutorial for modeling a mech in ZBrush.
Introduction to ZBrush 4R7
The Gnomon Workshop have announced the release of Introduction to ZBrush 4R7 with Madeleine Scott-Spencer.
555LAbs - Demoreel
555LAbs have posted a demoreel showcasing work done using LightWave 3D, Nuke, After Effects and ZBrush.
Pixologic have just released ZBrush 4R6, along with the new ZRemesher retopology tool.