Awesome Highlighter

One of the many websites mentioned at Computers in Libraries was Awesome Highlighter. This handy little tool allows users to highlight text on a page and then save a copy with a new URL. You can then send that URL to someone. The receipient of the email will see the highlighting on the "archived" copy of the page. You don't necessarily have to use the website. You can use a Firefox add-on and bookmarklet as well.