HIRE US - the Twitter Job Hustle, where 5 twitter accounts were used to scream the message "HIRE US" on Creative Director's twitter pages... see the video. (And apparently it worked)
Interesting approach to using twitter to create messages to creative directors via the Followers section of their twitter pages - Dutch team Bas van de Poel and Daan van Dam set up 5 Twitter accounts just for this little stunt, and ended up hired by Boondoggle.