I'm also trying a Aeroponic/NFT setup based on the article in June HTs. I currently have a 12 site veg system running and things appear to be going well. The one thing you may want to check into is using 35% H2O2 (Hydrogen Peroxide) in your reservoir. With Areoponics, you have a perfect 100% RH environment in the root zone and with if reservoir temps get over 72 deg, the odds for root rot increase in a big way. Using H202 at 1 TBSP per gallon can eliminate this, while increasing the oxygen in the water. If you're using any kind of live microbes, this will kill them, so think about what you're doing with nutes before going to H2O2.
I've also set up my systems to hold a bit of water in the channel in the event of a pump failure. The day I plugged the system in, I'd daisy chained a power strip off another and popped the breaker when the AC kicked in. The plants were without pump for about 8 hours and survived just fine. I pretty much felt like a dumbass after that one though..
Peace, Farmer Rich