Neowin reports that a new Microsoft Office 2010 beta build leaked on the Internet
>> Microsoft Office 2010 beta build leaks
The build, numbered version 14.0.4514.1009, is tagged with the "beta 2" naming. The leak reportedly requires keys to install but accepts Office 2010 Technical Preview keys. Michael Aulia of Craving Tech posted some screen shots and his initial impressions after Microsoft sent him the beta directly.
From the screen shots posted it's clear the UI has been refined in the Office 2010 beta and the program icons have been updated.
>> Microsoft Office 2010 beta build leaks