I think at this point the further away from Autodesk I can get the better, I really don't like the way they do business or customer support, and them re-incorporating 3d Studio Max and buying up Maya just rubs me the wrong way.  I'm really looking toward Lightwave at this point, since two of the "Xstream" supported programs are Autodesk and Cinema 4d has you paying for plugins to do some more advanced things that Lightwave already lets you do.

As far as moving up to ACAD 2007, it's our companies decision, and for the most part is just fine since we're a civil engineering firm putting out CAD plan sets, but when it comes to 3d I'm not going to be locked into one suite of programs because they want it to be that way.  I want to be able to pull stuff from one program and drop it into another without batting an eye, it won't stop me from using either program, but I tend to feel that the best toolbox uses MANY different softwares to get what you ultimately want (or in this case what the client wants) rather than having to find a way to make it work because you can't get your model out of your high end package and it won't easily do what a more specilized program like Vue will do with ease.

Oh, and I checked with the makers of polytrans (the 3d format converter) and their response was:  "Autodesk has used entirely new encryption for DWG 2007 so there is no planned shipping date for any translation company to provide DWG 2007 support right now."

As far as a solution for Autocad to Vue, I doubt there will be one, if anything I would worry more about them doing the same thing to 3ds Max and Maya that they're already doing with Autocad, making them more proprietary and limiting exportation.