Vonage is the second big VoIP company (almost 3 million US subscribers) to have an iPhone and iPod touch application. Skype, which Ebay sold today to private investors for $2 Billion, was the first.
There are many other VoIP services on the iPhone but they all have one thing in common: They are all only allowed to function on Wifi. Vonage will be no exception. While it hasn’t shown up in our app store, it is expected to by the end of the week.