Here are a bunch of wallpapers to choose from.  The links in the name take you to the post that introduces the wallpaper - you can find the wallpaper-sized images there.

Jalberto: Richard Jefferson (black)

Jalberto: Richard Jefferson (blue)

Hirschof: Warning: Blair Rebounding

Jalberto: Just Tim Time

Jalberto: The Rookie That Rocks

Jalberto: Here He Comes

Jalberto: Signature

BlaseE: Manu Warm Up

BlaseE: From Under the Radar

Dariusz: Polaroid Spurs

sleep research facility:  The Drive For Five

Hipuks:  Roger Mason

Hirschof:  Vitruvian Manu

BlaseE:  Dismantle Opponents.  Build Titles.

LatinD:  DeJuan "Rebound Demon" Blair.

Jalberto:  Spurs Calendar