I just finished updating the fun facts WordPress plugin. The new 2.0 version is a major upgrade. The widget code uses WordPress 2.8 widget architecture and I added a shortcode. You just have to put [fun-facts] in your posts or pages to have an embedded widget (see below). Get the fun facts WordPress plugin.
9 out of 10 people believe Thomas Edison invented the light bulb. This isn't true; Joseph Swan did.