I really like the idea of vignette's or scenarios that are class specific, mainly because it provides a mechanism to get folks who are not familiar with DnD to understand the basics of their class. That said, I understand it would be quite the undertaking since we know the classes will grow beyond 6. if that is the case you can always break things down through intro scenarios along the lines of melee, arcane, and rogue, or something like that. Personally, I think it's an investment in the growth of the game the more people that try it, having no previous exposure to DnD, and get hooked.
