I've got a Gmail account it's actually been sent me by my girlfriend. But since I've gotten that I still haven't received an invitation link as well.
Milen, You can set Gmail in outlook express by downloading "checkmailonyourdesktop.exe" through Gmail.
I have 50 invites for anyone that wants them. email me at RD6@charter.net with the subject "G-mail Invite Request" from the email address u want the invite sent to.