Longtime friend, and CounterPath founder, Erik Lagerway now runs the voice division of ZipLocal up in Vancouver. He has just announced the release of an open platform voice calling solution called ZipRing for the Apple iPhone.
Personally I'm happy to see Erik get this one out the door, but my guess is that what he has next in mind will be even better :-) Last fall I did some consulting to Erik around ZipRing as I've always viewed him as one of the top product development minds in our space. Basically, Lagerway has consistently built products and applications that just simply work. He, like PhoneGnome's David Beckemeyer simply understand the basic so well that when it comes to deployment, the product or app does what it's supposed.
You can check out ZipRing in the Apple iTunes App store.