or you could limit an aspect of the game to iphone...
Lets say there is a new item that is called... dunno say Workshop.
Works like a bed, you use it and you log off. This allows you to log on to your iphone and play say some minigames. Once you done when you get back in, according to how well you did in the mini games you get some resources, or prize.
guess could be like bejeweled, get 3 chances a day to play that minigame and depending how high you score you can score different Tier prizes... lets say if you failed 1 minute in... you get a twig. lol But say for some reason you managed to survive for 1 hour, you probably could some thing pretty wicked or exclusive... dunno say a really nice Symbol item that gives good table stats?
