Sure thing, I'll build them but somebody else will have to make the bones and animate them.
Great success! Alright then. I'll get to work compiling information & pictures (quite a shame, actually; I was fixing up a Pastebin thread on Wc3C for this exact purpose (concept art & descriptions), but a recent server breakdown lost all data from all the way back in early 2012, so it's all gone. Just more (re)writing is all :<...).
In the mean-time, and to give me a direction to go in, could you give me an idea of what you feel most capable of/interested in? (Arranged in general order of complexity):
A)[c]Lots of Wards (Augury (Hero, prophecy), Skullbloom (unit, mana-regen), Null (unit, no spells), Grim (Hero, ultimate mind-control & skeletons), etc)[c]Not technically a Building, but they are (basically) stationary, and can be quite simple, so figured I'd throw it out there (c'mon, they're Trolls; GOTTA have Wards.
)[r]
B)[c]T2 Aerial Support/Caster Barracks ("Vale of Shadows")[c]Utilizing some unused Blizzard work; basically just a nice re-wrap & some model-editing I believe.[r]
C)[c]Tower & Tower Upgrade ("Sentry Post/Watcher" -> "Tiki Tower/Evil Eye")[c]The animations intended here (spinning stones, floating eye, etc) might be difficult, the the mesh itself shouldn't be too bad.[r]
D)[c]T2 Ground Support/Caster Barracks ("Swamp Lodge")[c]Have a few ideas of what to stitch together, but still a little unsure.[r]
E)[c]T2 Mass Ranged Support Mech ("Dart Skiff")[c]Also not a building, but a mechanical unit (so similarly simple & blocky). Got some 'decent' art. Biggest problem is that nothing like it exists for me to base off of.[r]
F)[c]Racial Shop ("Ritual Circle")[c]This one could be really cool, if I could nail down exactly what it should look like. :<[r]
G)[c]T3 Ownage Device Barracks ("Forbidden Temple")[c]Really not sure about this one; if I get lucky & Jigrael makes a better Town Hall, I can use my existing one (RightField's) as this. But hey, if you have a good idea, I'd love to see it.
Let me know (if/about which) you need more information.