Sphere is one of the new Internet gadgets that allows you to provide related links on a specific topic on your site. When a visitor moves his/her mouse over a link on your site, a widget pops open with links related to that particular topic.
The Sphere Related Content Widget connects with an icon link at the end of your blog posts. When a reader clicks on the icon link, we find blog and media articles related to your blog posts…The Sphere Related Content plug-in works best on topics that are being actively discussed in the blogosphere and news media.
There is also a Mac widget for the Mac dashboard.
So go ahead, get sphered http://www.sphere.com/tools#getsphered