Flickr groups of interest

http://www.flickr.com/groups/939803@N24/pool/

A mountain bike group for professional photograhpers, heaps of great actions shots.

http://www.mattstuart.com/

Not a flickr group but some extremely well time photos by Matt Stuart

http://www.flickr.com/groups/underwaterbw/pool/

Underwater photography in Black and White. An interesting spin on often vibrant and very blue underwater photography.

Taken by Steve Steigman as an advert for Hitachi Maxell's line of cassette tapes, and has become a iconic part of pop culture. The mans hair is kept in the "blown" position with lots of hair gel and fishing line, the lamp shade, martini glass and tie are also held up with fishing line.