James Busby demonstrates nondestructive image flattening and reflection removal in Photoshop.
Ben Mauro - ZBrush for Environments
Ben Mauro has released a free 3D environment design tutorial using ZBrush, Keyshot and Photoshop.
Cyborg Design - Concept Art Production Techniques
Instructor Michael Pedro gives a detailed overview on concept art production techniques in ZBrush and Photoshop.
Photoshop CS6 Beta Released
Adobe have just released the Photoshop CS6 Beta online, available for free download.