Signed up twitter!!

It's been almost3-4 years i only knew orkut and Then i came to know about the Facebook shortly called as FB quite popular in America and other countries, but sometime ago I even dunno how to use the FB and suddenly one day i signed up with FB and Today am in a position such a way that I cannot resist my self from logging myself into FB and Two to three days back I signed up with Twitter and to say the truth both Twitter and FB rocks!!, best way to kill time....