"While the Hotmail home page did appear, attempts to log in were met with a message saying: 'This server is too busy.'
"Microsoft did not immediately respond to a request for comment. The company claims that Hotmail is the world's most popular Web e-mail service, boasting more than 145 million active users as of January."
Of course, 100 million of those people are probably spammers mail bombing the other 45 Million... and each other, of course. ;-)