Are those weights by the pair? I know Keen lists shoes, including their new lightened water sandals, by the one. So, the news Keens are just over a pound per set.
The Vibrams sure look like they'll pack down small, though! I'm not in the market, but the cool-factor of those shoes will have some of my Scouts shelling out the big bucks for them.
I'll stick with my "between 6 and 11 ounce" camp shoes, which I use for everything outside of hiking with the pack on.
10.4 oz for the Size 13's, 6.4oz for the 6.5's. Under ten bucks at Walmart, and they're VEGAN. :) Super comfortable, waterproof, work great with socks and don't stink.