Ben Mauro has posted a ZBrush video tutorial, focusing on the development of his Yukon Pit Crew project.
NanoTile Textures for ZBrush
NanoTile Textures is an unofficial plugin that helps create tiling textures using NanoMeshes in ZBrush.
ZBrush 4R7 ZModeler
Michael Pavlovich has made this quick run through of the basic functionality of the new ZModeler brush in ZBrush 4R7.