One more reason to use Magic Lantern not only for video: With the new capability to read raw sensor data they've got two great new amazing features for still shooters.
* Raw histogram
even in "normal" photo-mode (& of course live view): Unlike the Canon version you can see beyond the jpeg range, this should be a great even for people who never used ml before. Also it's amazing that Canon *didn't* add this feature in their fw, not even for 1d cameras...
* Automatic ETTR
: Now you can auto-expose to the right to max. dynamic resolution & minimize noise with clipping prevention!
* Silent DNG burst pics
(capture the live view image w/o flipping the mirror) - it's not full raw resolution and it might show the usual movie moire, but you can capture successive shots in 14bit raw as long as your cf/sd card can keep up :-) ... for example my 60d takes 53x 1737x1156 shots in <10sec, other more newer & better camera bodies have a larger lv resolution and deeper buffers für 100+ shots.
These features aren't yet available for all cameras, if you want to try you've currently got to use a nightly build: http://www.magiclantern.fm/forum/index.php?board=33.0