Our first paid (99¢ in the US) app has been submitted to the App Store. It should be available in a week or two.
It's called Greann Gaeilge, and it's a superset of Greann Free: it has everything about prepositional pronouns that Greann Free has, plus a lot more!
It's everything one of those expensive, bulky, laminated cards is--except it's inexpensive, very detailed, always with you, and as easy to use as a touch of the finger!
Plus it has a mini-browser that links directly to the Greann forums, making them very easy to use.
We'll have another announcement when Apple releases it to the public.