Hi LardLizard. When you say 'smart' do you mean closed in wedges that you can wear to work?
They definitely exist but I haven't seem them around much lately. I have no idea if these are your style but I've seen some wedges from Toms (the style is called desert wedges) and Fly London (there are some very odd styles on Fly London but there is a plain leather black pair of wedges). I saw some Hush Puppies low black wedges, the style is called Jalaina.
It's really hard to find cute, stylish and formal wedges. Good luck