I just installed the amazing Magic Lantern Firmware add-on to my Canon 60D. It modifies your original firmware to boot software from the card, and adds a huge amount of amazing functionality for shooting stills and video.
It adds on screen histogram or waveform and zebras while shooting video or stills, cropmarks, spotmeter, magic zoom for focusing, bit rate control, movie logging, up to step HDR bracketing. This is just awesome!
I am blown away! Canon should buy this or hire these guys. It is amazing how much more my camera can do for free!