There are a number of ways of delivering data in real-time but until recently it has looked like PubSubHubbub, with the backing of Google, was going to be the preferred method. However, the past couple of weeks have seen a couple of interesting developments which could indicate that the developer community may actually prefer HTTP Streaming.
AudioBoo brings the familiar tape-recorder type interface to the web with all the fixings. Take your audio recording, add a picture, a location, put it in a social context, throw in popularity ratings and you have AudioBoo. The simplicity and social aspects of this service make a great platform for podcasters while providing another avenue of media discovery for users. But it's new and still changing. If you're feeling like an adventurous explorer, ready for twists, turns and surprises, jump on in to the AudioBoo API.