Or use openid
Common OpenID URLs:
- Flickr: http://www.flickr.com/photos/<yourusername>
- Blogger: http://<yourblog>.blogspot.com
- Wordpress: http://<yourblog>.wordpress.com
- AOL: http://openid.aol.com/<screenname>
- LiveJournal: http://<username>.livejournal.com
- MySpace: http://www.myspace.com/<username>