Ars Technica: Microsoft has released the system requirements for the forthcoming Office 2010, and the news is good. In general, PCs that can run Office 2007 should be able to run Office 2010.
Specifically, the memory and processor recommendations for the new productivity suite are staying the same as the last version. However, Microsoft does recommend more free hard drive space for the new package and also suggests that having a dedicated graphics chipset will boost performance.
Ars Technica has posted a chart detailing the new requirements with the article.