Haystack Parking App -- Good or Bad?

Kevin shared some links said

Haystack is a mobile app that lets drivers trade public parking spaces for cash.

It's a pretty cool idea, but city officials argue that it inflates the cost of parking. Living in a dense city has it's hidden costs, but Boston does not charge for street parking.

I've been in that situation a few times where it took me 40 minutes driving around my neighborhood looking for a parking spot. I would have gladly paid 3 bucks to just to find a parking spot.

What do you guys think?

There's an interesting trend in mobile apps that provide services to circumvent city rules. I wonder if you guys at Mediocre have such an idea up your sleeve?