There is a thread in the Poser forum on this. Several sites posted that Adobe was releasing CS2 for free in a move to remove the license server for the old product. Then after people clogged the site to download some sites reported that Adobe had said "no not free except for existing cs2 owners, and yet the page remained up, no login required and the downloads and serial numbers all work.

 

At this stage I am simply confused because no difinitive statement has been made that I know of.