Windows Longhorn begins beta testing

It's official - Microsoft's long delayed new operating system, code name Longhorn, has officially begun beta testing. The invited will be able to download Longhorn Beta 1 and conduct the first official beta testing, and it's expected that Microsoft will allow the public to apply for the beta program later this summer. I remember getting a Beta version of Windows XP many years back - I wonder if Microsoft will send me one of the invites?