We're looking to catalog as many park-by-phone vendors that might operate (or want to operate) in the US. So far I've discovered:

Verrus
Clancy
Duncan mPark
Mint (Toronto)
New Parking (Calgary)
MobileNOW!
Cobalt RingGo (UK)
Parkmobile
iPark
Skymeter
Zipidy (defunct?)

Anyone know any others?

Thanks,
BW