The Rdio Web Service Ruby SDK by Rdio allows API interaction to implement audio and music streaming. Examples show how to authorize user credentials and create playlists from artists. Rdio has been recently acquired by Pandora. For integration updates, follow @Rdio on Twitter.
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.
Kaltura has released a new version of its Mobile Video Player SDK for Android and iOS that is leaner and loads faster than the previous version (2.0) Developers can use the Kaltura Mobile Video Player SDK to embed the Kaltura Mobile Video Player into Android and iOS applications.