Nimbuzz is free to download with no monthly charges and no credits needed. It's users have to only pay the lowest local rate to their mobile operator.
Nimbuzz is now mobile connected to Google Talk and MSN/Windows Live Messenger for Chat and Voice, which means that mobile Nimbuzz users can call their buddies on these communities on their PC against their cheapest local rate and can chat with them on their mobile for free.
With Nimbuzz users can also make international calls from their mobile phones to other mobile phones at the cheapest local rate — the only condition being that both phones have the Nimbuzz software installed. Nimbuzz eliminates the high roaming tariffs operators charge.
The product features mobile-to-mobile calls (also at local cost), free (Group) Text messaging and the ability to place Group Calls on the fly with up to 5 buddies (either Nimbuzz, GTalk or MSN Live Messenger). Mobile connected parties pay local cost, PC connected parties pay nothing.
"This release is a major step towards our next goal: connecting all major VoIP-communities on the Internet with the mobile for Chat, Voice and various Messaging services", stated Evert Jaap Lugt (CEO). "Nimbuzz is now testing the Yahoo!, AIM, ICQ and Skype connectivity, wait and see".
what is the future of this crowded VOIP/IM market?? Do you think they succeed?? 
