Well, I've only flown a couple of times since they put the body scanners in, but as I did before, I simply disconnect right before going through whatever x-ray machine they're using; I put my pump in a sealable baggie, and then hand it to the inspector and ask that it be hand inspected, explaining that it's an insulin pump. So far, no problem. (and, by the way, they've never taken it out of my sight...they usually give it a quick inspection and hand it back on the other side of the scanner.)
Several years ago I had a problem when I went to disconnect because the inspector saw me doing that and started screaming at me, "No, No, that's an insulin pump - you can't take it off!" I ended up with a patdown because I refused to walk through the scanner with my pump on.
And then there was the time I was returning to my cruise ship in Cadiz, Spain...the ship wasn't a problem, but they make you go through Spanish security before you can even walk out to the ship...they were very nice, called over someone who spoke at least some
English, but they ended up making me take the battery and reservoir out and they were sticking their fingers in the holes to make sure there was nothing hidden in there...eew! Man, I swabbed that pump with about 20 alcohol swabs as soon as I got back to my cabin!