If you donate some money to the Red Cross via whenthingsfallapart.org, they'll take over your profile pic. First it will break your avatar apart, and you'll look a right mess on twitter, as if humpty dumpty had a great fall. No worries, Red Cross will soon put it back together again. As they do.
Clearly inspired by the many people who change their avatars to show support for various things, Red Cross has made their changing avatar a pay to play game. You can't just show support here, you actually have to give a few bucks to the cause to do it. Since people like wearing their support on their avatar, why not set one up as a donation vehicle? Well done comp.social lab at Georgia Tech and Assistant Professor Eric Gilbert for creating this.