The Netherlands based Nimbuzz is the latest among internet communications startup companies that have started gaining a lot attraction. Nimbuzz is in addition to supporting already popular IM/chat services such as Skype, Windows Live, Yahoo, Google GTalk... also like Rebtel focusing on cheap and easy to user international mobile phone calls. Nimbuzz has their gateway locations around the world in places such as New York, Amsterdam and Hongkong supporting around 35 countries. What I find in particular interesting is that Nimbuzz is the first company actually addressing the vast majority of already available mobile phones that can download and run a Java application. This is a first step in a phased opportunity to finally move towards mobile VoIP thereby once and for all killing the old telecom operator approach to voice calling and in particular billing. More about to follow in a separate article.
Today, the drawback is related to cheaper or too old mobile phones supporting Java J2ME apps using MIDP v1 and operator preloaded phones you cannot easily change.
Since Nimbuzz is working on Java application that is using VoIP, it will be interesting to see what is in store for us users coming from competitors.