From Mike Wendland:

With 100 million registered users, the free Internet telephone service Skype has been on a roll ever since eBay bought it a few months ago. A couple weeks ago, it was free outgoing calls to regular landline and cellular phones from Skype via computers hooked up to the Net. Today, it’s free conference calling for up to 500 people at a time through a service called Highspeedconferencing.com.