Also wondering where any info about NetBSD's MAGIC formats may be found.

Side-by-side comparisons of supported formats would be nice but is probably
a pipe dream :)

Comparison with other OS's formats even better :)
-- 
travis@evtech.com | Klaatu Barada Necto | Obey the computer. Obey. Obey.
``My life is spent in one long effort to escape from the commonplaces of
  existence.'' -- Sir A.C. Doyle, "The Red-Headed League"          fnord