Has anyone ever tried putting BC in molds instead of fondant? I realize you'd have to let it pretty much dry in the mold. I think I'm going to mess around with that this weekend.

ABC doesn't dry hard though. Maybe royal icing would work, but I doubt BC

AMaybe you can freeze it to keep the shape. I'd much prefer to use fondant, gumpaste, or chocolate but to each his own :)

AYeah I think buttercream would just crumble and break, if you're looking for a white look you can use white chocolate.

No, regular BC won't work.  Rolled BC (search for a recipe) and frozen, you may get something useable.  If it's taste, then modeling chocolate is very nice.