This Service Pack was created as a direct result of detailed information and feedback from customers who used the CER Customer Error Reporting Utility or who reported issues to their reseller, in the Autodesk discussion groups, on social media like Twitter, or Subscription Support.
Keep the feedback and CER reports coming!
Check out all the details and download links at AutoCAD Updates and Service Pack Page
Also check out the security we have implemented in the SP1. Tom has blogged about them on his blog
The explanation about new security controls are at: http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=20327810&linkID=9240617
Update: The service packs have been pulled due to an issue found after release.