Linkedin is experiencing some big growth in traffic, and is in the number one spot on Alexa’s Movers and Shakers rankings. Their Alexa weekly traffic ranking just increased by 740% to put them in the 227 spot from 7,470.

Social networking caught on like wildfire among teenagers as MySpace.com has taken the #4 ranking. Is social networking catching fire among business professionals on Linkedin? It will be exciting to see if their rankings continue to improve.