My first version of the SM130 library for Arduino is available. It is loosely based on the SonMicroReader library for Processing by Tom Igoe, Timo Arnall and others. This will make it easier to port existing Processing applications to Arduino.

Included are examples for use on the RFIDuino. One does the same as my earlier demo application, the other is an interactive demo, with read/write capability.
I tested with ikTag (Mifare 1K) and tikitag aka touchatag (Mifare Ultralight).

Check out the online documentation.