John,
Well my hypo hasnt actually been proved out yet, but im pretty confident she will be. Am going the double het line with her though.
Im also working on some animals with very interesting stripes.
There is also Patternless and Ghost (simple recessive single gene), search for user Bodacious Boas on the kingsnake archives, and you should find.
Josh will be the guy to tell you what else is out there. Outback Reptiles has deeper pockets than i do
There is a rainbow morph book coming out relatively soon, or at least some chapters anyway, by John Berry, so hopefully he knows everything that is out there.
-----
Dave
Ive given up counting how many rainbows i have, but its enough to deplete my credit card every rodent order....
Im an aussie in an arctic environment
Helsinki, Finland