Posted over at pinstack, I've tried out on my 8310 with success, try at your own risk.
Unlocking with MFI caused the BB's to not be recognized by a computer.
http://www.pinstack.com/blackberryforums/showthread.php?p=993790&posted=1#post993790
EDIT: after the unlock, I would also receive a "device error - reset" screen after hitting "alt - cap - del"
This has seemed to fix that problem aswell.
Many thanks to the person that found this
Posted from my CrackBerry at wapforums.crackberry.com