Google Music Trends captures (after op in) the music Google Talk users are listening to and compiles the info into charts.
Music Trends is a snapshot of the music that’s popular right now among Google Talk listeners. Every Talk user who has opted in to Music Trends will cast their vote automatically, each time they listen to music on their computer. We’ll gather this information and display the trends by genre, listing the favorite songs and artists in each category.
You can click through from the trends results to information pages about the artist or album, courtesy of Google’s Music Search. Another click and you could be at one of a number of online stores from which to buy the music, either as a digital download or on physical media.
Not unlike Last.FM in the U.K – but with a far less social media vibe.