Yesterday, I got all excited at the idea that, like Microsoft did with the soon to be cancelled Expression Web, Adobe might have released Dreamweaver 8 along with the rest of CS2 to the public for free. This was a misunderstanding and it was only created for those customers who were attempting to activate that old version of the software. Sorry if I got your hopes up.
Adobe issued the statement:
"Effective December 13, Adobe disabled the activation server for CS2 products and Acrobat 7 because of a technical glitch. These products were released over 7 years ago and do not run on many modern operating systems. But to ensure that any customers activating those old versions can continue to use their software, we issued a serial number directly to those customers. While this might be interpreted as Adobe giving away software for free, we did it to help our customers."
The Microsoft release of Expression Web is still true, however! :-)