Popular widget AddThis (at right) and Clearspring have released news of a comScore study that claims they now reach nearly 50 percent of the entire global Web population - more than 500 billion people. Of course, that doesn't mean there are that many websites using the widget, but it does indicate that users are becoming more familiar using AddThis to spread content on the Web. That's good enough reason to consider using the widget on your blog or for specific content. Part of this boom in usage is due to AddThis being acquired by Clearspring last September.

Now, Clearspring looks to ride the momentum. A new feature of AddThis is Embedded Content Sharing. Using a customizable API, content such as video, flashe widgets, images, etc., can be shared with the AddThis widget to sites that support embeddable content. So, a user wanted to share your video on their own WordPress blog, they can do that. This feature is still new, but it points to the ability to share any kind of content, anywhere. This is one-button syndication that could prove to be a powerful method to share interactive content.