We saw that. They were using a single subscription for all their games. It was an interesting read. For those that might be interested: http://www.gamezebo.com/news/2011/12...-ios-app-wasnt
As for 3G, we play fine over 3G. We spent a lot of time trying to design a MMO engine that could play at decent speeds over 3G, and even EDGE. I have played the game over both quite a bit, and the latency is minimal. We also focused on small data packets, trying to keep the traffic low for the game so we wouldn't saturate your data plan if you play over Cell networks.