At the time they were created, Corns and Great Plains Ratsnakes were thought to be the same species, yet different subspecies, which naturally intergrated (like "Greenish" Rat Snakes [Yellow Rat Snake x Black Rat Snake]).
Since then, Great Plains Rats have been broken out as a seperate species than corns. Therefore the albino version of this cross, known as a creamsicle, is a hybrid (assuming you believe the current classification).
"Good" breeding projects are in the eye of the beholder. There are many people who want to keep their corns "pure."
As far as GPR x Corn options go, there's nothing wrong with simply making more creamsicles. In addition, there have been snow, hypo, and anery GPR/Corn crosses.
There's also creamsicle motleys and stripes - which I think look pretty cool.
Tim

Third Eye