I am hoping for this also. I have a 2.5tb drive.
I have a modified Wiimc.dol if you want to use it.
It works on NTFS formatted drives. Not sure about Fat32, I will see if it does. If it doesn’t I will try and fix it because fat32 would be very useful for me.
However if you do want to use it, I take no responsibility if your drive becomes corrupted, etc. I have been using this modified WimMC with my 2.5tb drive for almost a year now and no problems. But just a warning because it is not an official build.
It also has some bugs:
You can not Pause then Play. (Or will result in code dump)
You can not hit fast forward or rewind 2 times within about 5 seconds or it will code dump.