ACS have designed the application - Smart Biz Card - to be compatible solely with tablet devices. This means that the UI is almost unusable on phones such as the Galaxy Nexus. To get around that, you'll have to root your phone and change the DPI to one that will result in tablet mode being enabled. Tablet Mode, an application for the Galaxy Nexus, is an easy way to do this.
Despite the lack of features, this application is a great example of the expansion potential of Android. Hopefully it will encourage other developers to explore the idea of building Android applications for the ACR122, but with more functions. Maybe using an Android device with the ACR122 for ticketing? Card emulation on Android, perhaps? We can only dream.
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