Organizations:

http://www.scbwi.com

Helpful Tips:

http://yellapalooza.com/index.html
http://www.underdown.org/
http://www.jacketflap.com

Inspiration:

http://www.illustrationfriday.com

List of Agents:

http://www.ebookcrossroads.com/illustrator-agents.html
http://www.agentquery.com/default.aspx

Publisher database:

http://www.jacketflap.com
http://www.publishersweekly.com