Nimbuzz just launched low-cost international calling service called NimbuzzOut! It works on Symbian and iPhone with more platforms to come, and makes incredibly cheap calls to international mobile phones and landlines, starting at $0.02 per minute to UK or China.

NimbuzzOut represents the company’s first revenue-generating feature, launched in direct response to user requests of whom 69% recently surveyed said they expect to use mobile VoIP more than ever in the coming 12 months.

NimbuzzOut comes at a time of phenomenal growth for Nimbuzz, with more than 10 million registrations of the application since launch, a current growth rate of more than a million new registrations each month (that’s a new Nimbuzz user every 3 seconds!), a daily active user base of over 30% and an international user footprint covering every corner of the globe.

NimbuzzOut Credits will be available for purchase at Nimbuzzout.com, enabling users to save up to 95% on the cost of a traditional international mobile call.

Adopting a standard pay-as-you-go model, NimbuzzOut credits will be sold in bundles of 10, 20 and 40 Dollars and Euro’s. Users can learn more and check call savings per country via the rate calculator on the Nimbuzz web and wap sites.