In their newsletter this morning at cNet, they gave information on a Beta for Adobe (Windows & Mac):

Dreamweaver, Fireworks and Soundbooth

The beta versions will work for 48 hours for everyone. After that, registered users of CS3 products can request a beta serial key that will extend the life of the beta versions until the release of CS4.

Just in case you're interested!

**** I haven't even had a chance to play with my new CS3, somehow I just knew this was going to happen!