Photoshop is a wonderfully deep software package. No matter how much you use it there is always something new to learn. It is easy to fall into habitual ways of doing a particular task and often there are better ways of doing it. Seeing how some else tackles the same process often leads to solving a problem differently. 7 Things You Didn’t Know About Adobe Photoshop is a prime example of this.

Also the Wired How To’s Wiki has published a tutorial on Batch Process Images in Photoshop