Students from the Canadian Film Centre's Media Lab have created a Facebook application that allows users to send green challenges to their friends. Dubbed Greenwave, the app is still under wraps (ie. not available to the public - but photo of the app is above) but was previewed last night at Lennox Contemporary to launch this weekend's And then s/he turned to me and said exhibit.

Greenwave allows users to team up with their friends and work together to change their habits for a week. Among other features, users can send challenges such as use fewer plastic bags or take a mug to work and then track to see how green they and their friends are being.

Also on display last night (and through the weekend including during Nuit Blanche) were a number of other prototypes from the creative minds at the Media Lab including:

My Time - Intelligent and fun physical objects that can be plugged into a computer and configured to express a range of behaviours.

Gaku - A photo and video sharing appliance that friends and families can use to instantly share and swap photos with others around the world.

Shh Ahh Ohh - An audio visual installation that encourages participants to interact with the lights and shadows it creates.