You just type in the url and highlight directly on the page. Here is where I highlighted some things on my blog. How cool is that?
This would be a great tool to use with students when showing them how to research information.
<div align="center"><a href="http://www.technologyrocksseriously.com" target="_blank" title="Technology Rocks"><img src="http://i865.photobucket.com/albums/ab211/kreatedbykelsey/Emerson%20Lilianna/technologyrocks.png~original" alt="Technology Rocks" style="border:none;" /></a></div>