Perhaps Todd can correct me if I’m wrong but the offer for upgrading to 5.5 from 5 for $525 and getting CS6 for free when it’s released meant that you gave up right to future upgrades. Here is the graph from Adobes site with the salient points boldfaced:
Offer expires May 6, 2012, at 11:59pm (PDT). VOID WHERE PROHIBITED, TAXED, OR RESTRICTED BY LAW. Customers who purchase the most current Adobe® Creative Suite® software version, available through the online Adobe Store or Adobe Call Center, from 12am (PDT) on March 26, 2012, through 11:59pm (PDT) on May 6, 2012, will receive a one-time upgrade to the equivalent Adobe Creative Suite 6 product (download version only) at no additional cost when it ships publicly. Offer does not include Acrobat, Flash Catalyst, Flash Builder, Contribute, and OnLocation. Residents of embargoed countries are not eligible. Upgrade codes and/or software will be delivered electronically to the email address associated with the qualifying purchase. Ten days after the ship of Adobe Creative Suite 6 and no later than May 31, 2012, at 11:59pm (PDT), customers will receive an email with instructions and a unique promotional code to receive the one-time upgrade to the equivalent CS6 product. For select countries, customers will receive information in their Creative Suite 5.5 order confirmation email on how to redeem the one-time upgrade to CS6.
Internet access is required to download and install the software upgrade. Offer is not available retroactively and excludes future Creative Suite software version updates. Offer is subject to availability and U.S. export control laws and laws where the recipient resides. Offer may not be assigned, exchanged, sold, transferred, or combined with any other discount or offer, or redeemed for cash or other goods and services. Void where prohibited, taxed, or restricted by law.