TransMenus, jQuery style?

TransMenus, jQuery style?

I posted once already about this, but it needs revisiting.

Take a look at InPro vs Symmetry. InPro's menus reveal themselves from the top-down, whereas Symmetry's actually slide down. InPro is using jQuery with Superfish; Symmetry is using an older version of TransMenus (youngPup, http://youngpup.net/projects/transmenus/).

My question: Has anyone seen this replicated in jQuery using custom animations of some sort? TransMenus work just fine, but weigh in at 750 lines of code and require quite a bit of configuration. I'm not opposed to created a jQuery plugin for this (even trimming it down a lot if I can), but if it's been done already I'd like to know that first.