VoIP's project with Speex codec, speech detecting and crypto coding with traffic counting. All code is a pure Java, so completely cross-platforms. Traffic is about 9 MB per hour in both ends, sources: http://www.open-source-soft.narod.ru/arrow.7z
AS3 skype API for the Skype. Flash has access to the system Webcam, Audio and flash 9+ has all the capabilities to build a Socket communications. So we can have a Flash based skype client on the web. This can be a widget for instant chat & voice call.