From a quick conversation with a new member of staff wanting to launch a online radio show for the school I work at, from a post on twitter I came across Mixler at www.mixlr.com. Tagged as Social Live Audio, I created a free account and set about playing. Literally with 10 mins I have the first test stream online and playing.
I embedded the code and away we went. Early stages, but with the autoplay function, it allows me to embedd this in the digital signage system, and allows for previous shows to be recorded on the fly for listening later. Both desktop and ipad/pod compatible its easy for students and staff to start producing radio streams.
You can use 3 audio feeds, which should be ample for the basic of production, adding to playlists and great social interaction with your listeners, I would strongly recommend a download and get broadcasting.
I am even tempted to create a elearningsite channel podcasting show, if anybody would be interested in working on a show, producing podcasts on their elearning activities, drop me a line.