Social Networks

http://twitter.com - Social networking
http://hubpages.com - Share your expertise
http://squidoo.com - Share your expertise
http://digg.com - Learn what people are loving right now - and network with them
http://delicious.com - Bookmarking site … with networking
http://myspace.com - Advertise and friend building
http://plaxo.com - Social networking
http://linkedin.com - Social networking
http://facebook.com - Social networking
http://youtube.com - Online videos, advertising, and social networking
http://answers.yahoo.com - Share your expertise and social networking
http://friendfeed.com - Social Networking Aggregator

Research

StomperNet.com
internet business mastery
http://www.thirtydaychallenge.com

Broadcasting

blogtalkradio.com
http://seesmic.com/

tools
tinyurl