I've just recently been playing with the IMDB on TomeRaider, and it's fast and easy to get to the movie info (or TV show info). You only pay for the reader software, and then the wikipedia and imdb and wiktionary etc content is free. It's in a class by itself for fast large document navigation. Definitely worth doing a test run with the demo version if you have a compatible pda.
You can check it out here...
http://www.tomeraider.com/