iPod only would be acceptable as long as it supports iPhone. link?
Audiolink thing - http://www.mx5parts.co.uk/product_info.php/products_id/940
Can't find the circuit board version now.
You will need to check the firmware version of the stereo for the mp3 and ipod version.
The factory headunit's firmware revision must be 9.55 or greater. The unit will not work on earlier firmware revisions or with 9.81 or 10.01.
To find out which revision your Mazda RX-8 has, make sure the radio (FM) is turned on, then press and hold "TEXT." Then, also press and hold "1" at the same time for a few more seconds. The LCD should then report your firmware version.
And that colour car is all wrong!