On The Shortwaves - Devoted to the history of shortwave radio. Features early radio articles, book reviews, and other references for DXers and collectors. - http://www181.pair.com/otsw/
Hard-Core-DX.com - Collection of DX listening resources includes news and DX tips, Latin and Andean DX reports, Medium Wave DX, solar reports and antenna topics. - http://www.hard-core-dx.com/
Your Remote S-Meter Home Page - A Kenwood R-5000 communications receiver located in Salt Lake City that you can remotely control and receive S-Meter readings and audio from via a web browser. - http://www.smeter.net/
Shortwave World Band Listening - A guide for shortwave world band radio enthusiasts. - http://www.hamuniverse.com/shortwave.html
The Listening Post - Interactive web-controlled Drake R-8 receiver allows 5 and 30 second live sound bites, details of last 25 frequencies selected by listeners, and information about tuning controls. - http://www.chilton.com/scripts/radio/R8-receiver