Yahoo Messenger Pingbox is cool widget box that you can embed on your blog or website. It allows you to chat with website visitors without having to install or download anything. Now you can put this cool IM box on your Facebook profile.
It allows Facebook users to send IM messages from your Facebook profile page. Messages are delivered to Yahoo Messenger, even when you are not logged into Facebook.
As pointed by YMBlog, customization tools are also available in the Facebook version like personalize your online and offline greeting, choose design etc. Stir up some activity on your Facebook page and get Yahoo Messenger in action with Pingbox app for Facebook.