there are a couple of video tuts on radiant vista about b&w: -
The Radiant Vista - Video Tutorials - Black & White Infrared
The Radiant Vista - Video Tutorials - High Contrast Black & White
I used (or tried to use) some of the concepts in the first one for my b&w shots here: -
B&W Landscapes
I know, not much of an advert, but they where first attempts
EDIT: Forgot to mention, they as CS2 tuts.