HDTVpub

I ran across a neat little HDTV themed website this morning: HDTVpub.
The website has a good amount of info but mostly it can help you find information about local stations in your area. They will provide you with everything you would want to know about your local broadcasters including where their tower is. Plus, it gives you the resolutions that the stations choose to use and whether or not they are multicasting.
Information like this is helpful if you are trying to pull in their signal with an antenna.

Unfortunately though, their website is not complete. It seems that a user would have to input the data about the local station and the information mentioned above is not provided by some national database. While the website does have potential to be a great resource, it could also mislead consumers. They do have a great HDTV glossary and explanation of the benefits of high-def though, so it is not all bad.

Kevin covered a great website
a few months ago that will help you tune in that digital station. It does not have all the info that HDTVpub covered about the particular stations but it does provide a complete run down of available stations in your area.