Every year Dan Dos Santos and Irene Gallo (Art Director for Tor, Forge and Starscape Books) organize an exhibit of 5 x7" works called MicroVision. It is a fundraiser for the Society of Illustrators’ student scholarship fund.
LINK to blog post with the art for this year (via the Art Department)

Over the past four years it raised $20,000.00 which was given directly to students displaying exceptional promise in illustration.

This year’s line-up of participating artists(All pretty big names in the world of illustration):
Scott Altmann
Scott Bakal
Rick Berry
Bill Carman
Jon Foster
Donato Giancola
Michael Kaluta
Tim O’Brien
Omar Rayyan (see image above)
Jordu Schell
Allen Williams
Boris Vallejo