The new Canon 5D Mk II can shoot stills at 21mp but can also shoot HD video. Because of the relatively low cost compared to expensive high end video cameras and the wide range of high quality optics it is becoming a popular choice for independent film makers.
Watch the 3 Preludes to the Trailer here:
http://ow.ly/1dm0i
And the final trailer is here:
http://www.pacificpicturesblog.com/blog/
really amazing.