As of this minute, Coldplay has 392,819 friends on MySpace and 43,156 fans on Facebook. MySpace’s Coldplay page has four songs on it; Facebook’s one. MySpace’s are embeddable on your page; Facebook’s are not, yet. MySpace supports for-pay downloads (they’re priced absurdly high, but that’s not MySpace’s fault); Facebook does not. MySpace’s page has some personality; but Facebook’s has a user video and a discography. They both have band info and touring info.
Don’t count the “old guy” out just yet.