OK well here's a basic card trick, but I put a little twist on it where you can actually shuffle the individual piles. Sorry for going through it fast and the skip in the middle and for the low quality. I was originally trying to get it done in 30 seconds (because that's how long my little digi cam will record one file for.) Then I ended up having to start the tape again after 30 seconds so...
Effect
Shuffle
Split the deck into 4 seperate piles
Shuffle the piles
Distribute 1 card from the each pile to each of the other piles
Then repeat for all 4 piles
Flip the top card over
All aces
http://www.youtube.com/watch?v=R4t3B7juT6Y
Edit: forgot to post the link. I'll edit this post in a few minutes because the video is processing on youtube.
Edit 2: Here's another video:
A not so David Blaine arm twist. I used to be able to do it 540, but now I can only do around 400 degrees.
http://www.youtube.com/watch?v=wQUg2uOUpoY