Has anyone who can actually run the game tried using the saves with Degausser or BDXTool? I doubt that they work with Jam with the Band, but it doesn't hurt to ask.
Also, I wish the BanBroUploader would go up already. I went in looking for songs I knew and struck gold with Little Busters!, K-ON!, and music from Touhou games (it feels like I need an exclamation point here...!).
Little Busters! (password for all of them: loli)
K-ON! (????!) (password in descriptions)
Touhou (password for all of them: thbdx)
There are actually a few other arrangers who did Little Busters! and K-ON! songs, and a TON who did Touhou, but it'd take way to long to go through my text file that lists most of them. When I get around to downloading all these songs, I'll pack them up and reupload them.
If you're interested in music from the Touhou series, just look out for ??. If you can recognize the names in kana/romaji/english, that helps too, since not all songs explicitly say "Touhou" in the description.
P.S. My thanks go to Rubedo for sharing all this Daigasso! Band Brothers info + the massive BDX package.