Thanks, Barbalee.
I'm going to keep it for at least another year. I don't know what I'm going to do with it, though. The cristate form doesn't happen with every bloom, the blooms are smaller than I like, they are painfully slow to open, and they don't open as well as I like (which is perfectly flat or slightly recurved). And that's all ignoring the budcount and branching and whether or not it reblooms, and the slight (?) susceptibility to rust that it has. (It is ironic that this was one of two seedlings which I had earmarked for destruction prior to bloom, because it got some rust on it. Well, I am Queen of Procrastination, so by the time they were both sending up scapes and I unexpectedly saw some poly buds on the other seedling, I decided to give them both a reprieve for this season.
)
I guess a starting point would be to cross it against "bigger and better" cultivars (ones that have bigger flowers and better opening); on the other hand, I should probably look for other cristate daylilies, or else look at their parents... And I should not forget to look for rust resistant mates, too.