A couple ideas:
On the conversion from .ISO to .WBFS it would be nice if the user could choose the same GAMEID - GAMETITLE.wbfs naming that ISO export allows.
It would be nice if the export and convert allowed for GAMETITLE (GAMEID).ext or some such format, this way the games are in title order on the drive rather then ID order.
Perhaps allow both of these to be set on a settings screen using a %GAMEID% and %GAMETITLE% template? Then the user could choose the format they like most.
Would be nice if the system could rename the files based on the WIITDB information IE: in a menu select "Fix names" and "a boy and his blob" would become "A Boy and His Blob".
For WBFS partitions can you please display the size, space taken and free space in the status bar somewhere...
When trying to cram a disk full knowing that a 1.2 gig game will fit but a 1.3gig game will not does help a lot
BTW.. Great work!!!
*edit, added the size display and moved things around a bit*