Specifically for the needs of iPhone users, this will be the first complete messaging product available with landscape mode chat, IM buddy calling (including Yahoo!) and regional social network support.
Users turn the product on its side to use a wide keyboard for fast and easy typing. Furthermore, Nimbuzz is the first product to offer IM buddy calling over Wifi to Yahoo! Messenger as well as Google Talk, Skype, and Windows Live Messenger. Nimbuzz supports chat for local social networks, such as StudiVZ, the biggest German speaking social network, Hyves for The Netherlands, and Gadu-Gadu in Poland.
Other key updates include Personal Message allowing users to broadcast real-time status updates to all contacts, presence information to see who is online and where, and emoticons for additional expression.
I think with the help of the application on the iphone we can use the iphone for voip services 
