Found an old archive on Aminet, but nothing in that source suggest how to get the MAC (not even sure if that old ifconfig was even able to return such info).

Geit pointed out in IRC that I could just obtain the username on registered machines (allways thought that was hidden in some super secret handshale API) which will work in similar way and has the added benefit of users being able to easily transfer that file inbetween computers. MAC based might still be a nice option.

Guess you'll all find out on Sunday what I'm rambling about.

[ Edited by Kronos 15.05.2015 - 20:46 ]