Office 2010 Beta has been released for MSDN and TechNet users along with Office Web Applications. Office 2010 Beta is available as only Professional Plus SKU (32 bit and 64 bit variants) while Office Web Apps are available in x64 variant only for self hosting in corporate environments.
The Office beta build is very similar to the leaked technical build and contains new icons, installation procedure, social networking features, themes as well as other improvements. Check out Manan’s post for a detailed overview of the changes.
The build number for Office 2010 Professional Plus is 14.0.4536.1000. Download it now if you have an MSDN or TechNet subscription or you can wait till after the PDC keynote when it’s expected to be released to public.