Cinemek is a 35mm lens adapter for digital cameras. It works by allowing you to attach a variety of lenses to the end of your digital camera, giving you more control of the depth of field than the stock lenses for the camera would. I've never used one so I don't want to expand to much on it, because I don't know to much about it. I know that there a variety of 35mm adapters available commercially and that some people actually put them together themselves. There's also a bunch of nuances to the footage, like it being recorded upside down, the lenses need to take in more light, stuff like that. Here's a forum with more information on them.
http://www.dvxuser.com/V6/forumdisplay.php?f=113Here is also a forum on the site which has a lot of footage from the DVX, some with adapters and some without. Some of the footage is really good, but some of it can look terrible too. Good looking footage usually depends on getting the right exposure, framing properly, color correcting, etc. But here is the site with more user posted footage:
http://www.dvxuser.com/V6/forumdisplay.php?f=12I haven't bought a DVX or anything, I've only used it on some shoots, but I've always felt that if I had the money I'd probably get it and trick it out. It's a pretty expensive investment though. Most people I know who have it are videographers who make a living using it so they make a return eventually if they work enough, you know?