If you still haven't found a vertical planter idea that is exactly your style, maybe this one will do it for you. The pots are simply held in position by a single piece of rebar put through the drain holes of the pots. Perfect for small herbs!
Schubladen - Ordnung 55 Genius Storage Inventions That Will Simplify Your Life -- A ton of awesome organization ideas for the home (car too! A lot of these are really clever storage solutions for small spaces.