One of my favorite websites packed with information about Karate is www.karatethejapaneseway.com. It is loaded with good information and has a low traffic message forum with some really experienced Karate practitioners.
The owner of the website has also written an excellent book named Karate the Japanese Way that is filled with down to earth information that should be read by all who practice Karate.
Be sure to check out the website if you have a chance.