Federal Communications Commission
Everything you wanted to know about your favorite Federal branch can be found on the FCC's comprehensive web site. Reams of information on daily actions and petitions, proposed rules changes and much more. The Audio Services Division has FM and AM search engines which are lightning fast. The Video Services Division has the TV search engine.
Although the formats haven't been updated in ages, it's still a very useful site for determining rough-estimate coverage areas of both AM and FM radio stations. Has direct links to station websites, streaming links and Google Maps.
FCCdata.org (formerly RECnet) is a valuable resource for unearthing all kinds of FCC data for FM and TV stations, as well as helpful for prospective LPFM applicants in finding open spaces on the radio dial. They're also big into Japanese music and offer a long-running J-pop and J-rock streaming station.
Alabama Historical Radio Society
The AHRS is for anyone who has an interest in old time radio: shows, restoring vintage equipment, and radio history.
The Birmingham Black Radio Museum
A digital chronicle of the city's black radio stations, including WJLD, WATV, WENN, WBCO, and others.
The Fascinating History of the Car Radio
An interesting write-up on the originals of car radios, from the earliest days of the medium up through the 21st century.
World Radio Map has radio station listings for hundreds of cities all around the world, including the United States. Includes links to streams and great pictures of transmitter sites in many cities.
Television and Radio in Southwest Alabama
Keep up with the goings-on in Mobile and coastal radio and television with this thorough site.
The Worldwide TV-FM DX Assocation
Home of a comprehensive list of FM stations across North and Central America, their database is a valuable tool for FM DXers.
I Take Pictures of Transmitter Sites
Like looking at photos of antennas, tower, studios and transmitters from all over? This Facebook page is open to anyone who enjoys radio's technological side. (Membership required, free.)
New England-centric tower photography for the über-radio nerds.
AV Science Forum covers all kinds of home theater and HDTV subjects, but of particular interest are the market-by-market forums for HDTV reception and discussion. There are forums for Birmingham, Mobile/Pensacola/Ft. Walton Beach, Montgomery, Huntsville, and Columbus.
Not just a dial listing for Atlanta AM and FM, but also some absolutely wonderful histories!
A wonderfully useful tool for locating nearby DTV signals and plotting reception graphs and other geeky stuff. Essential for setting up an OTA antenna!
Some folks are still hanging onto good old fashioned C-QUAM AM stereo. It's a big improvment for music on AM radio and sounds much better than most people give AM credit for. A few stations still run it, and they're listed here. Meduci, who hosts this list, also sells a fine AM stereo tuner and decoder board to diehard AM stereo fans.
William
Hepburn's Worldwide Troposheric Ducting Forecasts
VHF
Propagation
Sporadic-E
and Estimated MUF
If you're into FM DXing, these are indispensable tools for predicting tropo sessions through the southeast and world. Use this to find the optimum time to hunt out elusive distant radio stations.
A great tool for shortwave listeners, it helps you discover what you're listening to just by putting in a frequency.
Don't be fool-ed by the name, these are useful tools for the radio geek. Find and plot transmitter distances and more.
Although it hasn't been updated in over a year, this is still an interesting and useful tool for discovering what stations are broadcasting over their RDS feed.
A handy text list of known and suspected LPFM formats, with links to station websites and more.
Information on DTV in the Columbus, Georgia television market.
The paper's media column is available online and a good source for keeping up with coastal radio, TV and papers. (Subscription required)