Microsoft has decided on an official name for Longhorn: Windows Vista. That's according to sources close to the company who requested anonymity. They said that Microsoft unveiled the name in Atlanta on Thursday at the company's internal sales event, known as the Microsoft Global Sales Briefing, or MGB.

Word of Longhorn's new name began leaking to the Web on Thursday evening. One Windows site discovered that Microsoft registered the WindowsVista.US domain name. Microsoft is expected to make the official announcement of the new name on Friday morning.

Full story: Microsoft Watch