Philip Bloom is reporting the release of Magic Lantern firmware for the Canon T2i (550d in Europe.) Like the Canon 5D mkII before it, the Magic Lantern hack adds some great features like audio bars, zebra stripes and gain control. They claim to be working on a hack for the 60D as well, which we are extremely excited about.
Here’s a video with some great info about the hack.
For more info check out Magic Lantern.