Arts and Entertainment
http://antwrp.gsfc.nasa.gov/apod/astropix.html
http://www.goodreads.com
http://photography.nationalgeographic.com/photography/photo-of-the-day

Entertainment and Humor
http://www.boingboing.net
http://cakewrecks.blogspot.com
http://www.kusc.org
http://www.girlgeniusonline.com
http://www.hulu.com
http://icanhascheezburger.com/
http://www.kevinandkell.com
http://www.museumofbadart.org
http://www.npr.org
http://pandora.com
http://www.pbs.org
http://www.theonion.com

News and Politics
http://www.alternet.org
http://www.aldaily.com
http://www.drudgereport.com
http://www.factcheck.org
http://www.nationalgeographic.com

Reference
http://www.about.com
http://www.bartleby.com
http://www.craigslist.com
http://www.dictionary.com
http://maps.google.com
http://www.scholar.google.com
http://www.howstuffworks.com
http://www.imdb.com
http://www.mapquest.com
http://www.snopes.com
http://www.wikipedia.com

Science and Technology
http://www.gizmodo.com
http://www.popsci.com

Search Engines
http://www.ask.com
http://www.bing.com
http://www.clusty.com
http://www.dogpile.com
http://www.goodsearch.com
http://www.google.com
http://www.yahoo.com

Shopping
http://www.abebooks.com
http://www.amazon.com
http://www.bookcloseouts.com
http://www.ebay.com
http://www.scientificsonline.com/

Social Networking/Media
http://www.facebook.com
http://www.lifehacker.com
http://www.linkedin.com
http://www.neatorama.com
http://www.thesmartlife.com