I asked Gaile a long time ago about the Mini Glint thing, and she said the devs said it was impossible. Polygon problems or somesuch, according to her.
That having been said, I'd really like to see:
Mini Dwayna
Mini Avatar of Dwayna
Mini Tyrannus
Mini Flowstone Elemental
Mini Cobalt Scabara(looks a bit like an Alien, doesn't it?)
Mini Ventari
Mini Flame Djinn
Also, for lols:
Mini Frog
Mini Pug -- Although, I don't think this model moves. Maybe I'm wrong?
Mini Hippopotamus! -- I'd really like to see this. I really wanted one of these. I'm bummed they removed it from the game.
Mini Reindeer -- I really wish this was tamable, but a minipet would be nice, too.
I'd really like to see Jade Torn Kirins (Jade Sea model) and an Enraged Kuunavang, but seeing as those models have already been used for minipets, I don't see it happening.