This thing is quite realistic. And if you click “Download”, you get an offer to install a nasty little Trojan (Sunbelt Sandbox report here).
The trojan, “updateKB890830.exe”, downloads from a site that looks like a Microsoft url, so it’s all quite realistic to the user.
This was reported to MySpace by a number of individuals and it’s gone now (incidentally, the MySpace abuse team reacts quite well to submissions at abuse(at)myspace.com).
(Hat tip to Randall Mueller for finding this one)