Vonage is launching a Wi-Fi phone so you can now use your Vonage account anywhere you can find a Wi-Fi connection. There's a $50 rebate on it... for a price of $79.99 and a minimum 3 month contract. There will be an early cancellation fee too. This is a substantial price break from the retail price I see elsewhere for the UTStarcom F1000. It almost suggests they are dumping it on unsuspecting consumers. Engadget described this as for the hard core only. Still it's a new market and the features you will be getting soon on these Wi-Fi phones will push the mobile operators. The Starcom can be purchased as a stand alone Vonage solution. Thus you no longer need an ATA / Vonage box to participate. Will Vonage offer a Softphone next for free?

The UTStarcom F1000 Wi-Fi Phone is a pocket-sized, wireless Internet phone that uses Vonage service by connecting to wireless Internet access points worldwide, also known as Wi-Fi hotspots. It's an easy way to bring your Vonage service anywhere. Vonage - The Broadband Phone Company

I presume the Starcom is locked to Vonage although I can't be sure. I doubt you can just buy it from Vonage and transfer it to another SIP provider at a later date. I'm tempted to try one. I'd like to hook it up to the PhoneGnome I'm using currently.