I met a couple friends at Centro Paninoteca last night after one discovered a coupon for it. Tucked away on the NW corner of Shea & Scottsdale Rd, I never would have known it existed. I'd describe it a hole-in-the-wall wine bar - which is a good thing! Cute little place with a patio outside and a bar and a few tables inside.
Centro seemed to have a decent selections of wines. They also have a pretty extensive menu - lots of apps and paninis. I tried the "grilled cheese panini" which had fresh mozarella, roasted tomatoes, proscuitto, and greens and was served with a mixed greens salad on the side. The salad had a nice balsamic vinaigrette and was topped with some roasted red peppers.
Very friendly service and the bartender was knowledable about the wines, but as more and more people came in, we were a little less attended to. I'll still go back, but it did bump them down a star for me. Note: you can't apply coupons to happy hour, which is the case in most restaurants I've had coupons for.
If you're looking for an unpretentious little wine bar with reasonable prices in North Scottsdale, definitely head to Centro.