The new service from Google will integrate a quick buying system called "Click-To-Buy" into youtube videos. The links once clicked bring you to Amazon’s MP3 store and iTunes where you can then buy the related song or media.
After the install of iTunes 8 and you agree to the terms, you are presented with the new album view as pictured above. iTunes then asks you if you want to use the Genius Playlists. Once you agree to the terms, iTunes downloads your information and now when you play a song it makes suggestions of music to buy on the right sidebar. The new thing it does which is a nice added feature, is the Genius playlists. Simply select a song and then hit the genius button in the bottom right and it will grab 25 songs it thinks go well together. In using this for a half hour or so the feature and song selection works very well.