Saw news article about Axis on BBC web site today, so tried it out. Its available on the desktop as a browser extension and also on iPad and iPhone.
I tried it as a browser extension inside Chrome. Its a very quick install and setup via http://axis.yahoo.com/
Below is a screenshot example of a search for Euro 2012. As you type your search query, it shows you a list of possible searches underneath and matching visual searches to the right hand side. In the Euro 2012 example, it shows the official UEFA Euro 2012 site, then the Wikipedia page for it, then some other Euro 2012 pages.
What I’ve seen so far is good, though with these things it takes a while before you know if you like something new or not. One of best ways to tell is how much you use it.