Macromedia Release MX 2004 some what long time ago but no one posted so I will...
I got Macromedia MX2004 Studio and there is a BIG difference between MX and MX2004.
1) When opening Dreamweaver,Fireworks,Flash,FreeHand there is now a welcome screen! In the welcome screen you open easy open used sites.
2) The menu bar has not tabs any more but all in one. With a navation bar to swith.
Well if you are just going to get Dreamweaver you might as well get Fireworks because it is an example of how both products together offer a powerful solution when designing and programming websites quickly.