Microsoft has officially sent invitations to their best beta testers and to the WinHEC participants for their Windows Code Name Longhorn beta program. They also unveiled a new Beta Client which promises to be better than the current beta management systems, and will replace other means of beta distribution, including WindowsBeta and BetaPlace all in one fell swoop. While the new highly anticipated operating system is not up for download, Beta 1 is expected to be up for grabs later this month. Unfortunately, it seems that the preliminary invitation codes are unique per user. Microsoft is expected to allow the public to apply for the beta program later this summer, and as usual, Longhorn will be a part of the CTP (Community Technology Preview) program. AeroXP has some new screenshots of Longhorn.