They did a pretty nice article about Get the glass at Digital Arts from UK. They have som stuff online here.

When we spoke at OFFF in Barcelona we showed these results for Get the Glass campaign (6 weeks after launch);

*Approx 6 million visitors.
*Approx 650 000 visitors has reached the Glass at Fort Fridge (takes around 15-30 minutes of playing).
*First week we gave away 4000 glasses to users that finished the game (only in US).
*Worldwide press in New York Times and Metro among others.
*The California Milk Processor Board has already sold 10 million more gallons of milk than it did the previous year.

Good result is always fun cause then you have a happy client!