Adobe -> How to get your FREE upgrade
When your customers purchase Acrobat Standard 8.0 and Acrobat Professional 8.0 or the suites including these products between the 2nd June 2008 and the 31st August 2008 they can claim a free of charge upgrade to version 9.0 (or CS 3.3).
Your customers should contact Adobe customer services on 020 7365 0733 providing a proof of purchase (P&P may apply). All claims MUST be made by the 15th September 2008.