Red Rock Micro is a company that creates cinema rigs for DSLR cameras. It's not cheap but in relation to cinema rigs for film cameras, it's cheap. It'll set you back around USD 2500 for an extensive rig (the one above).
Red Rock Micro is also sponsoring a great DSLR film festival called dailyfilm and here's the site: http://www.dailyfilm.tv/festivals/dailyfilmtv-dslr-short-film-contest
The point of this is...anyone can do this. Just do it.
Here are some more samples.
