A possibly serious threat to VoIP carriers and even Skype – Google Voice seems to match up enhanced functionality, a unified ‘one’ number philosophy AND a great price point. Whether it can be rolled out internationally to combine all the features and SMS notifications remains to be seen however the concept is very attractive. The amount of times I’ve played voicemail tennis with friends and colleagues means that the current offering is behind the times – a unified number with cheaper calls, forwarding and notifications as well as full mobile compatibility would undoubtedly pose a threat to existing telcos.