Click4Choice offers a virtual, dynamic, person that talks to your directory visitor, when they hit your listing in the Click4Choice's directory. Here is an example of CW3 Web Hosting's Directory Landing Page.
The press release at PR Web reads "Click4Choice has chosen Oddcast, Inc to employ a virtual person to greet visitors as they browse the listings. Click4Choice is the first Directory to offer audio/visual listings which is extremely effective in getting a message out." Found by way of Cre8asite Forums.