In a previous post I noted that you could still use Xrost to top up your AllofMP3 account.
This option no longer appears on the Refill Balance page BUT you can still redeem Xrost iCards by:
Logging into AllofMp3.com – https://ssl.allofmp3.com/login.shtml
then pasting in the following URL – http://account.allofmp3.com/pays/payments.shtml?action=step2&via=xrost
which bring up the payment step for redeeming Xrost iCards.
Seems like the screw is getting turned another notch!