Here's a great DVD that teaches you a key sleight of hand card move as well as a few tricks that effectively employ it.
And it's a bargain at only 15 bucks. If you've always wanted to learn the "pinky count" (I know that it's an indispensable, constantly used move in my personal sleight of hand toolkit), Doug Conn's "Pinky Swear
" provides excellent instruction.
You can read my review here.
The Multiple Revelation Project by Andi Gladwin, Rob James and Vanishing Inc
Review of DVS by Mark Calabrese