Civil 3D 2009 Update 2.1 now available
Autodesk previously published and then pulled Update 2 for Civil 3D 2009. They have now re-posted the service pack as Update 2.1. To download this update, go to this link:

http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=12624522&linkID=9240698

Be sure to read the Readme file for a complete list of the changes in this service pack.