Web-email

My work's blocked access to web based e-mails (Gmail, Hotmail, Yahoo, etc). Obviously this sucks!

Anyone know of any REALLY obscure web e-mail systems that might not be on my IT's filter?

Currently on the blacklist:
Hotmail
Gmail
Yahoo
Webmail
AIM
Mail2Web.com
mail.com
juno.com
Postmaster (UK)
E-mail anywhere.com
Rocketmail
Netaddress
Sitemail
Geneologymail
www.37.com
mail.inuyasha.nu