Ben Mauro has released a free 3D environment design tutorial using ZBrush, Keyshot and Photoshop.
NanoTile Textures for ZBrush
NanoTile Textures is an unofficial plugin that helps create tiling textures using NanoMeshes in ZBrush.
Fausto de Martini - Interview
CG Channel have interviewed Fausto de Martini, former 3D art director at Blizzard Entertainment.
MatCap Materials Pack
Adam Lewis has donated a MatCap materials pack containing 36 materials for ZBrush.