Autodesk has released several online resources for AutoCAD 2010. Now I know it doesn't release until March some time, but you can start learning about it and it's features.
Autodesk has released a preview guide and some demo videos. There was also a live webcast on February 5th announcing its release. They archived that webcast for us to view.
Live Webcast
AutoCAD 2010 Videos
I hope you find these online videos useful. Before you know it, subscription members will start receiving their copies of AutoCAD 2010.