Fanatic Live

According to this page, it looks like a new special Passport domain especially for use with instant messaging has been created: messengeruser.com. It’s not just for LCS, because it’s a standard Passport, it works with MSN Messenger! The domain was registered on the 2nd of March, so it’s still fairly new, you might be able to get some cool addresses first

Although you have to enter another email address on sign up, sending email to the new one just bounces. They could have at least forwarded it to the other one!

This doesn’t seem to be very well known at the moment, so go spread the word (after you’ve registered some unique names of course :P)

Immi also adds:

Not only have they registered the .com but also the .biz .net .org etc

Sign up at https://register.passport.net/reg.srf?ns=messengeruser.com.