Rampage, it's interesting that you find it that way. For me, MX is full of bugs and unusable and MX 2004 is the one that is working very well.
serialbeggar: I've heard a lot about inconsistency with Macromedia products. Get a demo and really work with it before you upgrade. If MX is stable for you, there is no point to upgrade - the new features aren't very useful, most importantly, you can live without them.
Dreamweaver is still by far and away the standard web design tool. VS.net for web development is no where near as popular (or as good in my opinion). Although I suppose for ASPX it is probably better, but I IMO that's it.
I use Dreamweaver often (just because it's quick for small changes)... well infact I am Macromedia certified in it (the exam was one heck of a lot harder than I thought it would be).
Yeah, MX2004 is a big rip off, it was supposed to make css much better to handle but that doesn't work either. CSS will never work on DW until it can read other positions than absolute on the design view. When they launched MX2004 there were a lot of bugs and the timer was left off; the upgrades did fix these issues. If you are using extensions, some of these extensions will not work with MX2004. So check first.
Frankly I don't know why DW is so popular. It's really a poor app. Don't know about Vnet, will check it out.
2004 crashed on my quite often. My school recently upgraded a few of their labs to 2004, and are having no problems. These are macs. A few of my friends were purchased licences by our employer, and we have all found it to be rather unstable on our PC's. I'm sure this is an isolated case though, not a representation of the overall community.
I wouldn't bother upgrading. I had mx, now mx 2004. As far as I'm concerned they're pretty much the same. I wish Macromedia would sort out Dreamweaver so it actually properly previewed all pages. When viewing in ie they almost always look different, although some are subtle....
The only mx 2004 software i recommend is Flash. And i only like that because of little interface changes that make it slightly more user-friendly, no new NEW things to play with.