Microsoft has frustrated many people by making Windows Live Messenger an invite only service while it was being tested, but the frustration is now over! If you would like to test out the latest version of Windows Live Messenger then simply follow the link below and under the section that says “Windows Live Messenger beta” select “Sign Up”. After logging into your Passport account you should be prompted to download the new Windows Live Messenger. Finally, everyone gets to enjoy this messenger service.
Also, a few weeks ago Microsoft had a bug on their servers that allowed people to signup for the service without being invited but this time it is official.