I was just checking that shit out and although I don't understand how to get that shit in my sig, I do fear that it's tracking the use of MP3's by each user...
Do you see why this would be a problem in the times of the RIAA??
I mean, you get a unique code for what reason, other than to know what MP3's, and how many a specific user has....
Anyhow... LUXT & TECH! Woot!