Back in February I posted a blog entry on how S60 was in the lead for mobile VoIP and it seems that now Windows Mobile is catching up with the release of a new client. The excellent mobile VoIP application, fring, is now available for Windows Mobile 5 and 6 devices. The same powerful functionality and connectivity as you have seen on the S60 platform is available for Windows Mobile. Thus you get fring, Skype, Google Talk, and MSN integration as well as Twitter support. I used Skype before, but it is still in beta and has some issues so I look forward to trying fring on my T-Mobile Dash and also a T-Mobile Wing.