Fio V3 question

Hi there.

I already have an Arduino Fio and now I want to buy a Fio V3 (the red one). Fio and Fio V3 mount two different microcontrollers, the one of V3 should be the same as dell'Arduino Micro, which has 8MHz and a working voltage of 3.3v.

Has anyone ever used it? There are problems for using it with the Arduino IDE?

Thanks in advance.