Perhaps you could explain (on the site) what retweeting is and why it would make ones life better to engage in it. Perhaps you could also explain it to us here.
Basically, when you see someone tweet something you find interesting, something you'd like to share with your friends/followers, you copy and paste their message, and usually put RT @username at the beginning. This helps ideas spread through twitter. We're taking away the need to copy + paste, and putting the retweet request in the URL itself to help with the 140 character limit.
