Who is the Idiot now ? 8) :
Wii Backup File System(WBFS) by Kwiirk.
WBFS is a simple file system to store wii backup in an efficient way on a harddrive.
=== Wii Filesystem ===
All Wii Games do not take advantage of the whole 4.7GB DVD.
A lot of WII dvd sectors are in fact never used, even if there is random encrypted garbage in it.
WBFS knows about the wiidisc filesystem, and will copy on the wbfs partition only the part that are really usefull.
The idea of ignoring unused wiidisc sectors is not new, and is implemented in the WiiScrubber tool.