well, if you're talking about dynamic range on canon DSLRs... I've done quite a lot of research in that department, and the result of that is my Similaar suite of Flaat picture styles:
[url=http://www.similaar.com/foto/flaat-picture-styles/120108.html]http://www.similaar.com/foto/flaat-picture-styles/120108.html[/url]
the most extreme ones (flaat_3 and flaat_4) increase the DR recorded in the video footage (the DR that's captured by the sensor is obviously unchanged, but a smaller portion of the shadows is crushed to black before going through the H.264 codec and never coming back to life)
I've measured about 2 extra stops of DR with Flaat_4 when compared with the standard Canon picture styles (e.g. "neutral with contrast=-4"), and over a stop more latitude than CineStyle or Marvels Cine (before you say I'm lying: look at those waveforms)
there's a downside, though: all that extra DR comes from not clipping the shadows, and those lifted shadows will be noisy unless you're recording with an awful lot of light - at least they're not clipped, but these are by no means your workhorse picture styles
the other two picture styles in the suite (flaat_1 and flaat_2) are the ones designed for day-to-day use: they deliver the same DR as technicolor cinestyle and marvels cine (which is to say, nearly the same as the standard canon picture styles), but should lead to easier-to-grade footage (as opposed to marvels cine and netral_4, which often lead me to clay-looking skin tones) and cleaner final images (less noise and smoother gradients than with cinestyle, by virtue of a more efficient use of the available color space)
you can see a test video here:
[url=http://vimeo.com/34943260]Flaat video tests[/url]