Although the next iteration of Microsoft Office is about a year away, some minute details are already starting to emerge.
When doing some digging with some files in post-beta builds of Windows 7, its been discovered that Office 14 will be available in both 32-bit and 64-bit flavors. It also shows that there will be an upgrade path from Office 2003 or 2007, even if you want to go 64-bit.
Also showing up is a snippit of milestones for Office 14. While the details more or less reveal some of Microsoft's marketing strategy, it does show an RTM estimate to be in the first half of 2010.