Skype have announced a new service based on the SIP (Session Initiation Protocol) that is aimed at getting more small businesses into Internet telephony. The service allows VoIP services to be created using standard PBX setups that support SIP, reducing the need for additional hardware (i.e. PC) that most current Skype users face.
One surprising downside though is that it requires you to create a new Skype ID to use it. This is a rather curious requirement in my opinion and one that is sure to puzzle many.