FS Browser

Raven has released a new homebrew application that will let you browse your Wii's internal file system.

If you want to compile yourself, you have to put the su stuff named as su_certs.bin, su_ticket.bin and su_tmd.bin into the data folder.

Press A to enter a folder, B to go back to the parent folder, up and down to navigate and 1 to dump a file to the root of the sd card.

Link