I really liked exploring Web 2.0. There is so much to search!
I can see where this would be very beneficial to our library patrons because you can search for just about anything. Here are a few I looked at:
http://www.yelp.com/ Find out what is great, and not so great in your area.
http://wwwl.meebo.com/index-en.html For those who are into Instant Messaging.
http://www.revolutionhealth.com/ For those interested in health issues.
http://www.biblio.com/ A great site to find books that are out of print.
http://arcaplay.com/ For those who are into on line games.
And the list goes on...
These are just a few searches that I found interesting. I know you will find what you are searching for. Try it out! I think it is very easy to maneuver around to get to where you want to go.