A terrific short (35 mins) movie comparing the video capabilities of Digital SLR's. This test includes the Canon 5D Mk II, 7D, 1D Mk IV Nikon D3S and Panasonic GH1. The test also includes a comparison with movie film.
Fascinating stuff.
Salton Sea Beach from Philip Bloom on Vimeo.
This is a Phillip Bloom video shot with the 550D.
His impressions of it here:-