I just found this. It's here.
you just upload the .bin file with the snapshot in it, and it shows you it, you right click, select "save as...", and you have your super smash bros brawl snapshot as a jpeg!
The .bin files are in this directory of the mem card:
(SD Card Name)/private/wii/app/RSBE/al/al_YYMMDD_HHMM.bin
It has the date as the name.
here is one of mine:

I just thought that was worth sharing.
[EDIT]
One more thing, if you want to see all of the snapshots ever uploaded,either click on gallery, or click here.
you just upload the .bin file with the snapshot in it, and it shows you it, you right click, select "save as...", and you have your super smash bros brawl snapshot as a jpeg!
The .bin files are in this directory of the mem card:
(SD Card Name)/private/wii/app/RSBE/al/al_YYMMDD_HHMM.bin
It has the date as the name.
here is one of mine:

I just thought that was worth sharing.
[EDIT]
One more thing, if you want to see all of the snapshots ever uploaded,either click on gallery, or click here.