Thanks Jayne for turning me on to this.
From the Wiffiti website:
A new technology called Wiffiti is spreading across the country, enabling people to send text messages to large flat panel displays in social venues such as cafes, bars and clubs. Wiffiti is grounded upon the premise that sending messages to a public screen rather than a private phone will resonate with both the location and its community.
Messages sent to Wiffiti screens are also visible... more