Facebook currently has over 40 million registered users and according to an article I read they are growing at 2.4% a month which would be a huge chance to draw new customers/players into Graal and introduce new developers and players into the PC version of graal.
Has anyone considered creating it as a facebook application and then utilizing the payment methods that Facebook offers that other social games use like the ever so popular 'Farmville' and 'CafeWorld'. Using facebooks api you can make it more interactive by pulling information from facebook and using it in game. I just think that creating a good flash version of Graal that is open to many more users would draw in a lot more revenue because I know quite a few people who spend money on applications like Farmville and other facebook applications. Maybe it could possibly bring in more money than you are currently getting from the iPhone Graal application. I know there used to be a flash version of Graal on the main site but I also know that it required you to have Graal already installed on your hard drive so I'm highly doubtful that that could be modified to work with facebook. I'm on facebook no matter where I go I always find an excuse to get on it and so is just about everyone I know.