There is a video (it’s a fake) showing someone play runescape on their iTouch. Don’t believe it’s possible, it’s only a video of a guy standing in a busy world on runescape. The only possible way is if Apple released Java (the thing that runs runescape, maplestory, battleon, WoW and many more MMORPG games.) So officially, as of right now, there is no way to play games that big on a little iPhone/iTouch.