1. Office 2010 will be available in both 32-bit and 64-bit versions.
2. Office 2010 will run on Windows XP SP3, Windows Vista, and Windows 7.
3. Groove becomes SharePoint Workspace. This is true. Please read the Groove SharePoint Workspace team blog here for the scoop.
4. OneNote and SharePoint Workspace going into the ProPlus SKU.