Hi,
I made a newbie mistake and flashed it with the incorrect firmware. So I am offering a bricked TP-Link TL-MR3220 to be posted to within the United Kingdom.
http://wiki.openwrt.org/toh/tp-link/tl-mr3420
(I have brought a replacement - one for the learning curve.)
Happy to post it to any OpenWrt developer, with a history of SVN commits free of charge. If no developers want it, I will send to others for the costs of postage.
Regards,
Brendan