There is a new library --- https://github.com/Seeed-Studio/PN532 for you. Have fun!

NFC Library for Arduino to communicate with Android

This is an Arduino library using NFC Shield from Seeed Studio to exchange NDEF message with Android. Using protocols - LLCP and SNEP to get and put NDEF message.

This library is based on

• mbedded-PN532 - https://github.com/mweir/Embedded-PN532
• Ndef - https://github.com/don/Ndef