Buy Nothing Day is on November 24th in the UK, just to give you a heads up, 23rd if you live in the US or Canada.
All the details are on their site, but in essence it aims to be a 24 hour moratorium on consumerism:
“Saturday November 24h 2007 is Buy Nothing Day. It’s a day where you challenge yourself, your family and friends to switch off from shopping and tune into life. The rules are simple, for 24 hours you will detox from consumerism and live without shopping.”
Join the group on facebook if you like, and look out for any events near you – ideas used in the past include creating a ‘shopping free zone’ of beanbags and free stuff, organising swap meets, wearing zombie masks around malls, jamming checkouts, walking very slowly, or throwing tantrums in public places. Up to you whether you get involved in those…
Update:
Buy Nothing Day 2008 will be November 29th.
The Earthbound Report 
Love This!!!! I will put a link on my blog about this.
I was also happy to find this was info from a Christian site as it seems this type of activism is not found in the Chirstian relm..so sad.
Blessings,
Debbie aka The Real World Martha
my friend and I are doing a documentary on Buy Nothing Day. Its actually a lot of fun, and I participated in it last year.
I hope you except HTML comments, because you have to see this video:
If not check it out here: http://www.youtube.com/watch?v=-zNwWrtVoCI