Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
Unless you are using a flat panel as the center piece of a theater, with controlled ambient lighting and all then it seems a little unreasonable to expect black level performance from any device that makes black by blocking light generated 100% of the time.
Also, the common implementation of flat panels are in environments with plenty of ambient lighting, for which very little of any real contrast ratio will be realized or observed. I single candle in an otherwise black room is enough to impact the black level performance of any device, include CRT projection.
And finally it is a common joke that you cannot trust marketed contrast ratio figures as they are typically off by a factor of 10-1000. And why shouldn't they be since no cowsumer protection on this front exists. Thus, society accepts the lies of the manufacturers with open hands.
Buy, cowsumer, buy! :)