Prousy, Whistling Straits would probably work, they have played a PGA there in the past, not sure when its up again for the pros. I think only courses that are going to be played on the tour or LPGA have a chance at making it to this game.
To answer your second question, I started here 12/29/2009. In my short time here I have come across many seasoned experts who first started playing on much less then the 2 courses I have (BP and KIA). Within 6 months of my start date, there were 4 full courses for stroke play. Clearly we are heading in the right direction.
You want more courses? Convince everyone on your friends list, and all the rest of your real world friends to join and donate a couple of bucks. Its pricey to add new courses.