It’s a good time to release an extension since extensions are now available on the beta version of Chrome on Mac OS X.
My extension’s description:
Easily find, listen to and download mp3 and ogg files found on a web page.
Watch for the play icon in your address bar. It will appear if there are mp3 or ogg files on a web page. Click the icon to see a list of file names that you can play from the popup or download.
Discovery may not be always ideal, working on that. If you switch tabs you may have to reload the page because of the way Chrome handles page actions. Handling tab switching is on the todo list.
Uses HTML5 audio element, no flash.
Download it on the Chrome Extension Gallery: Dionysus