Also, consider what the most popular smartphone platform is right now. iOS.
Makes sense to get maximum exposure as quickly as possible, then get the also-rans later.
Frankly I don't expect them to develop a version for my platform of choice (Windows Phone 8), so I'm out of luck.
XBL Gamertag: JWRebholz
PSN ID: jwrebholz
...No, I'm not very creative when it comes to this sort of thing.