Was talking earlier about Virtual
Tradeshows...
People automatically think it's another Second Life. Well... not exactly.
First, the audience is probably not the one you want to sell stuff to. So then, for a corporation, how do you prove ROI? Well, for Second Life... you don't. You can increase the Brand awareness and create an entry point into web sites. That's the big win.
Seems to me like the virtual tradeshows are slanted more towards sales and hard ROI $$. I'm on a mission to generate $$ for Sun... can't you tell? ;-)