Doh...just tested this out...seems pretty sweet...
When backing up any savedata for Super Mario Brother - the NES VC version, the savedata saves to "WII_ FAGE - Super Mario Bros." WITH the "." at the end.
I think that "." at the end of the folder name is causing a problem in Windows.
When I try to access the folder, I get an error:
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Savedata
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SD:\BlueDump\Savedata\WII_ FAGE - Super Mario Bros. refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location.
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OK
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That "." also causes a problem in Ubuntu...I wasn't able to see the folder when I tried with Ubuntu.
What I found to fix it was, put the SD card back into the Wii, fired up FTPii on the Wii, connected with my fav FTP app, then I was able to remove the "." in the folder name and life is good again.