Google has outdone itself with one of its coolest (if least readable) logo "doodles" ever: A logo celebrating Les Paul's 96th birthday that actually plays music. Just hover your mouse over a string to pluck it. Under the logo is a red button that can record your creation. Hitting it will also enable keyboard controls; each key corresponds to a note, and hitting multiple will allow you to play chords.
Techie Buzz even went so far as to figure out the keys for the Titanic title theme on the thing (first line: K KKK K JK k JK L ; L). The only downside: It doesn't support multiple octaves or sharp notes. So what do you think: Is this cooler than the playable Pac-Man doodle? The doodle has proven so popular that it's got it's own permanent home now.