Just today I had a Sonoran Hot dog in Jacome Plaza (from "Hot Dog Titulu".) I can't say it was quite as good as the ones on Presidio Plaza (I think that cart is called Grand Canyon Hot Dogs, but I don't quite remember), but it didn't stop me from eating it all.
The whole topic of Sonoran Dogs showed up on the New York Times Dining Section last week. Here's the article.
Now, if I could only remember that my phone is also a camera, I would have a picture for you.