Try these:
(gum) http://galaxy.uci.agh.edu.pl/~gorecki/portra.htm
(gum) http://www.macchicago.com/krohne/GumP.html
(gum and cyan.) http://www.collideascope.com/empire/ebb/in.html
and a couple of other very nice alt. process pages at:
(Pt/Pd) http://members.aol.com/Kerik717/
(daguerreotypes) http://java.austinc.edu/dag/TDShome.html
several other galleries with a variety of processes are linked at:
http://www.bostick-sullivan.com/
http://www.mikeware.demon.co.uk/
and I might as well plug my toy camera site while I'm at it:
http://members.aol.com/Smieglitz/Dianarama.html
I also have a few examples of gumprints and cyanotypes scanned and could
email them to you if interested. If so, let me know off list.
Joe