According to the vendor, fringland Ltd., Fring is a mobile internet service and community that allows you to talk, chat and interact with other "fringsters" and all your online buddies from Skype, MSN, GoogleTalk, AIM, Yahoo, Twitter, ICQ and of course Fring. All of this is available via your iPhone's internet connection. The key feature, however, is the ability of this App to make voice calls via VoIP over a WiFi connection. All of this is available over the multiple connections available on your iPhone: 3G, WiFi, GPRS, and Edge. Text messaging is the only means of communication possible over all four connections.
The App also brings all your contacts into one searchable list including all the instant messaging buddies mentioned above. You can then easily see who is online and the best way to reach them before making a call or talking to them in a live chat session. The list also includes the contacts on your iPhone. Fortunately you are not limited to paging through the list with your finger, which might take a while since there is a way to perform a search. This helps, but does not alleviate the need for an improved scroll bar.
With the release of the new iPod Touch, which accepts microphones, you should be able to make VoIP calls with the iPod Touch when connected to WiFi.