Any news on the development?
I got a Galaxy Nexus and I've been playing around with NFC.
Since I didn't find any support in your app to enter keys for a mifare classic card, I had to make my own app reading the tag with hardcoded keys (for my bus card).
My goal is to be able to emulate the whole card, but I read something about a special patched rom.
Found some info about the secure elements
Nice app btw