Replace RFID chip with RuBee chip (System using an Arduino Card )

Hello,

Please, I would like to know if it is possible to replace the RFID system (reader/tag) by a RuBee system (when implementing a system working with an arduino card).
Are we going to use one of this protocol I2C/SPI(for communication between Arduino and reader) or another one ?
Does a RuBee Module compatible with arduino exist ?

Thank You !