There continues to be innovation in the active world of Twitter and a tweeting star became a character from a popular TV show (Mad Men) and engaged thousands of followers.

Carri Bugbee was already an active participant on Twitter. She got the inspiration to "be" the Peggy Olson character and started posting. As this Ad Age video demonstrates, it was so successful (she won a Shorty Award) that she is now building a Twitter Ad Agency for entertainment companies.

Seems to me entertainment properties will want to start guarding who can have their Twitter character names (kind of like the rush in the dot com age to register celebrity domain names). This will be interesting to watch.