Codescar Radio Widget produces a widget for your wordpress site allowing your users listen to a radio station from your website. It uses html5 audio element to play radio in sidebar.

Features:

• Admin can select default station, set initial volume and autoplay or not.
• Control of the radio stations available from an options page (Adding / Removing from db)

Soon to add:

• Maybe a fallback to play asx streams. HTML5 can’t play them yet.

Link: http://wordpress.org/plugins/codescar-radio-widget/