If you haven't played with the Magic Lantern firmware updates, and are feeling brave, there's a fantastic new version of the firmware that really unlocks a TON of new features for the camera. My friend James Thorpe has a full list of them on his blog here: http://jamesthorpe.com/blog/?p=381
For those not familiar with Magic Lantern, you should be. Alex and the community at Magic Lantern are developing their own firmware for Canon cameras, and they've been able to unlock a lot of features to make these cameras more useable for the video pros. Check it out!