Dr. Di Mauro Diapa---whatever his name is, is a big proponent Arginine and puts it in a lot of his supplements (which I believe is what the NO actually is).
Biotest doesn't bother with N.O. because they are under the impression that there are no lasting gains from N.O. products and that the gains (i.e. the pump) isn't something you really keep in the long term, or really even much in the short term, and that instead they just make your veins pop out (which is obvious).
Based on all the research I've done I think there is some benefit from N.O. but there are far better ways to gain muscle, such as the Biotest's products that cause an insulin spike like Surge.
I use the N.O. type products when I'm cutting, because I'm not looking for an Insulin Spike because I'm trying to get my fat % down as low as possible. So I think these types of things are worth it during the cutting phases.
But if you're trying to pack on muscle then go check out Thibs workout nutrition thread. I'm convinced that Insulin Spikes (i.e. Surge Recovery) are the best way to pack on muscle, but I'm also of the opinion that they are unnecessary for cutting.
All that being said, it sounds like Anaconda is going to be low carb, and therefore would make a good cutting supplement, which will probably make these N.O. products obsolete.