www.qsl.net/oe3mzc/receivers.html
The site listed here contains 16 web-controlled shortwave receivers. You may listen to Amateur radio communication, shortwave broadcast stations, or very low frequency communications (such as sunrises and sunsets, storms and submarines) using remote receivers, all you need is a soundcard, speaker and RealAudioPlayer with your Browser.
The people who place these receivers on the internet are using some of the most sophisticated communications equipment and antenna available, and you can get to receivers located all over the world !!