Microsoft's Reed Shaffner posted some info on the upcoming MS Office 2010

So while we aren't ready to start demoing and sharing all of the features quite yet, we have heard the feedback loud and clear that requirements for running our software needs to be available ASAP (you will see if you look here that our server products have released similar information). To that end, this post will cover the preliminary system requirements for Office 2010.

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. You don't need to replace hardware that is capable of running 2007, it will support Office 2010. Like Windows 7 has demonstrated, we realize that taking advantage of the hardware you already own is just as important as supporting all the new technology coming out.

Below, we have tried to cover some of the common questions that we are anticipating on this topic. If we missed something please let us know in the comments. Anything that we can share at this point, we will.