Mon, Mar 15, 2010 is the last day to upgrade Autodesk 2007, 2008, or 2009 licenses using Autodesk’s tiered upgrade prices. Autodesk's Simplified Upgrade Pricing begins Mar 16, 2010. At that time all upgrades from 2008 and 2009 products will be half the price of a new license of software. All Autodesk 2007 products will also be retired on that date which means they will no longer be supported or upgradeable.
You can read more about Autodesk’s Simplified Upgrade Pricing at www.autodesk.com/upgrade.