In Omaha....maybe 1 -2 a yr. Usually at car meets. Where I am at right now...0. While driving mine I have only seen 2 in my entire time owning my NSX. Funny I will spot one when not in my car though.
Same area as Nukem... there are 5 of us here on prime now in the area who may plan to hook up or show up at a coffee and cruise or car show. Then I see them.
But apart from a planned meet, I have never seen another NSX in the WILD when I've been out in mine (since March 08). Maybe 1 to 3 sightings a year in the WILD when I've been in another car.
Most people aren't sure what they are... from Ferrari, Lamborghini, Corvette... some Honda/Acura guys definitely droool over them.
I had mine at the World of Wheels car show here this past March & I was told there were quite a few people gawking & drooling over it. I wish I had spent more time at the show people watching, or hanging out near the car. I had a busy schedule. (It was the only one at the show & I had car guys in the show coming up and asking me what it was.)
There was a red 2002+ or an earlier NSX with the 02 conversion in the area I saw a couple years back three times, but I was never able to connect with the owner. I thought I almost had him corralled once at a left turn lane, but at the last moment he switched lanes, went through the intersection on a green, pulled a U-Turn, came back and turned right onto the street we were going to go on... by the time the left hand turn light turned green, it was long gone. (I was in my DD).
In these parts if you see one in the wild you better be quick, or they are outta sight and long gone. Similar to the Big Foot phenomenon.