Here's the opportunity to tell Adobe your views on their products!
Or just see what others have told them.
Click the "Dear Adobe"
Also the answer to a question I hear often, it's from John Nack's web site at Adobe.
MAY 04, 2007
CS3: Switching platforms, free upgrades
Q. Can I switch my product from Windows to Mac or vice-versa?
A. Yes. Just call Adobe Customer Service (800-833-6687 in the US; 020 7365 0733 in the UK; more country-by-country numbers here) for assistance. The process, as I understand it, involves signing an agreement stating that you've destroyed the product on one platform, and in return Adobe will send you the product for the other platform. According to the service folks, there may be a cost involved; verification of product is required; and restrictions apply.