For goodness sake. There are people out there (myself included) who are wanting to give some of their money over to play this game yet are unable due to the lack of support for Vista.
As I work for a company that has developed applications in .net from the 1.1 days I can't comprehend why there is a debate regarding this. Unless I'm missing something it should be trivial to port the application to 2.0 or even 3.5 for that matter.
How's about doing this in the next hour or so and giving us a beta that will allow us to login. Once you've done this, allowing everyone who's bought a new computer in the past year or so to try out your game, you could then proceed with option two or three.
Algernon.