I'd be happy to answer any questions you guys have about using Nitinol wire for rigging. I don't know of any real online sources of info for using it anyway. For those that don't know, Nitinol wire is flexible but fairly stiff and springy. It will always return to straight unless permanently formed with heat. It is easily cut with an X-acto blade on a hard surface like glass or a ceramic tile. It's natural color is dark, almost black.
There are pros and cons to using it for rigging. Pros are that no holes need to be drilled in the model, the rigging can be done after all the painting and finishing, there are no worries about wires getting bent, wires are adhered with white glue so clean up of mistakes is easy.
Cons are that the rigging really adds no structural strength so any flexing of the model will result in problems, many wires will need to be cut to exact lengths and that can be frustrating at first but that gets better with experience, probably only viable on small to medium size 1/72 subjects.
There are probably more pros and cons that I'm not thinking of but for the most part it works well. I started out drilling holes and using invisible thread to rig biplanes but once I started playing around with Nitinol wire I never went back and have done dozens of models that way over the last few years.
My procedure is to add the hard-to-reach wires first, usually the ones around the cabane struts. Then I'll add any fore-and-aft "X" bracing between interplane struts, then the landing and flying wires. It is impossible to get a pair of dividers in many places to get a measurement for the wires so I cut a piece that is on the long side and hold it in position with tweezers to get an idea of how much to trim off. When I'm happy with the length I'll use a fine paint brush to put a tiny dot of white glue where each end of the wire will attach, grab the wire with the tweezers and put it carefully into position. Sometimes I'll dip each end of the wire into the glue puddle to "tin" the ends. I'll usually add 2-4 wires at a time, then let things sit for a half hour or so before doing a few more. Actual working time to do an entire 2-bay biplane is probably under an hour, it goes pretty fast once you get the hang of cutting the wires to the right length, that gets to be a Zen-like thing after a while!
-Dan