About soundfonts, there is the fluid-soundfont-gm (and
fluid-soundfont-gs) that is in the Debian/Ubuntu repository, is licensed
under MIT, and sounds pretty good. It's quite large though (145 MB).
(Available for download at:
http://packages.debian.org/en/source/sid/fluid-soundfont )
It seems to me like neither Christian's GeneralUser_GS, nor the
VintageDreamsWaves-v2 (that comes with a SVN checkout) complies to
Debian's Free Software Guidelines, as they both restrict modification in
some way. So they will most likely be removed from the Debian package.
I know that Linux is bigger than Debian (and that Fluidsynth is bigger
than Linux!) and that other distributions are unaffected by this
limitation, I just wanted to add that point of view.
// David