The VoIP blogosphere is buzzing about a hot new application called Hullo. Alec Saunders, who has been using it for awhile, describes it as “one of the slickest VoIP concepts I’ve ever seen, especially for the college crowd.” Could it become a challenger to folks like Gizmo and Skype because of its social networking focus. Alec’s review is here. Phone Boy is not as impressed because it only works on Windows machines. We would love to see a web based implementation of this, totally devoid of any installs.