How to resize and print out a stencil (in Microsoft Paint)
T-shirt Printing 101 (w/ paint & freezer paper)
T-Shirt Printing 102 (w/ screen-printing ink & freezer paper)
T-Shirt Printing Tips (Pros, cons, and my favorites)

Multi-color printing:
Aggrolites design 2 color on red
Anti-Nazi symbol - 3 color on white
Anti-Fascist Flag - 2 color on white
Cock Sparrer logo - 2 color on white
Defects design 2 color on black
Misfits design - 3 color on black
Toasters design - 3 color on white
Food Not Bombs design - 2 color on white
Less than Jake design - 2 color on white
Catch 22 design - 2 color
Skatalites design - 2 color
mad caddies design - 4 color *

also: OneLegOut.com has a tutorial for stenciling, both for print & graf