I don't really like this idea... I mean, some models would be a lot of pain to do (hi, Terra Mune's hair). Also, some voicers don't agree with their UTAUloids' portrayals in the fic (y'know, Yesi, Yue, Chichan, and some others, I guess).
So, making a MMD "anime" and asking the voicers to voice said characters will be simply impossible. And I know you won't want HANASU up this shuiat.