About 90% of the accounts on this site, and a similar number on our associated wiki, have just been deleted as they were presumed to have been registered by spammers. This did not include any of the accounts that had shown signs of legitimate activity, such as posting a comment, blog entry or profile information.
Nonetheless, there may have been some legitimate accounts deleted. If your account was one of these, I apologise. A backup of your account is available and it can be restored on request. Otherwise, simply create a new one or login with your OpenID.