When Danish entrepreneur Tommy Ahlers sold his 'social phonebook' ZYB to Vodafone in 2008 for €31 million and joined the company, it didn't seem like he would stay forever at such a slow-moving corporate entity. And sure enough he has now left. But ever the restless entrepreneur he's decided against lying on a beach somewhere and careered headlong into a new startup which is poised to

HipChat, a recently launched private instant messaging service for companies, has added support for voice and video chat as well as guest access.

Similar to Campfire, HipChat provides a simple application for communication within businesses. HipChat offers both a web and desktop client based on Adobe AIR that lets you chat with your entire team at once, or hold more private discussions with select team