Great to hear from you... we don't yet have our firmware ported to the Arduino, although the protocol is pretty simple and you should be able to duplicate it fairly easily if that's too critical for your particular application.
Nevertheless, our sensors have an analog output, reason for which you can hook them up to any third-party MCU (such as the RFDuino). In case you're interested in porting the firmware you can find the source code available at:https://github.com/BITalinoWorld/firmware-bitalino
We also have an API for the Arduino, which has been designed to enable data acquisition from BITalino and unpacking via the UART:https://github.com/BITalinoWorld/arduino-api
Looking forward to hear about your projects. In case you have any additional questions we can help you with just let us know.
The BITalino Team