The 72 hour Habitat JAM,

The 72 hour Habitat JAM, an ‘unprecedented online global dialogue on urban sustainability,’ is coming 1-3 December, 2005.
Sponsored by the Government of Canada, in partnership with UN-HABITAT and IBM, the Habitat JAM promises to engage, empower and stimulate tens of thousands of global citizens, rich and less fortunate alike, with the ultimate goal of turning ideas into action on critical issues related to urban sustainability.
Here’s the slightly breathless hype:

Tens of Thousands of World Citizens Unite Online to Debate Urban Sustainability Issues
Open to everyone interested in creating a better world.
Come for an hour or stay online for three days
Register www.habitatjam.com

Sounds cool nonetheless