A new version of the first Dual Layer ISO image dumper that has been verified to work for the Nintendo Wii has been released ( http://nekokabu.s7.xrea.com/blog/2008/02/post_34.html ). Using Wii/GC Raw Image Dumper Ver.0.05 you can dump the “second” layer of dual layer Nintendo Wii discs and with a little work join them with the first layer to produce a working backup.

Thanks to brakken / http://www.tehskeen.com for the news.