I hadn't heard of BIAS before. Fortunately, I absolutely love the Nano-7 I got a few weeks ago. I'm 6'5" and 240lbs, nearly the worst case scenario for light hammocks, but the Nano-7 has given me some fantastic afternoon naps in the park down the street.
To solve the bug issue for overnights I bought a HUG bug net for the Nano-7 from Arrowhead Outfitters. It's a sort of half bug net designed by Derek Hansen (http://www.hammockforums.net/forum/showthread.php?t=49849). It's 5 oz, could probably be done DIY for less than 4 oz but I'm lazy and the construction on Arrowhead's is top notch.
I've also got to recommend Jacks 'R' Better tri-glides as a killer and underrated alternative to whoopie slings. For the same or less weight than many whoopie sling systems they're simpler and every bit as adjustable. I attach them directly to my hammock for a total weight just under 10oz. Should be just over a pound if I ever scrounge the dough for a cuben tarp. Still, with my Hennessy asym tarp I'm still under 1.5 lbs for a super comfy shelter.