Just found this over on appleiphoneschool, and it gives a little insight into Fring. Worth a watch.

Fring has been released in BETA form, allowing users to take advantage of Skype, MSN, ICQ and more on their iPhones.
fring™ is a mobile internet service & community that enables you to access & interact with your social networks on-the-go, make free calls and live chat with all your fring, Skype®, MSN® Messenger, Google Talk™, […]