Topo is a new company by Tony Post (a guy who previously headed VFF). He left a comment on one reviewer's blog, saying that these shoes have a minimum stack height of 12mm (15mm with the insole). If these shoes had been a tabi version of the VFF Sprint, I might've given them some consideration.
I like the looks of these, but they are still shoes. Since going Barefoot 3+years ago, my show tolerance is minimal. Ha. No pun intended. Lunas are my footwear of choice when I must wear something.
I would try these if they appeared at a store near me.