Though I can't imagine why anyone would need 5GB of email space, the guys at OCHQ have changed their contest to give way just that. That's a lot of attachments...

"We have made some changes to our running contest; the winner now gets 5GB of email space instead of 1GB! We are going to give everyone who registers in our forums for the next month a free 50MB email account. So stop on by and sign up today, the free for all ends July 31st."