AshMan says…
The web page for the Office 2010 Beta has gone live and is showing three different versions which will be available for test.

Office 2010 Beta Page
Home and Business is one of the versions available and probably will be the most popular of the downloads, and it includes Word, Excel, PowerPoint, OneNote,Outlook, and Office Web Apps.
Professional is the next version available offering Word, Excel, PowerPoint, OneNote, Outlook, Access, Publisher and Office Web Apps.
The final version which is available of the three is Professional Plus which includes Word, Excel, PowerPoint, OneNote, Outlook with Business Contact Manager, Access, Publisher, Infopath, Communicator, SharePoint Workspace, and Office Web Apps and it mentions that it is only available to Volume License Customers.
All three are expected to be offered in both 32 and 64 bit, and if you are a MSDN or TechNet subscriber you can already get access to the download from your normal download area. I am downloading my copy and will report back with a review shortly.