Pledgebank

Pledgebank is an interesting approach to enlisting community participation for accomplishing common goals. Users make public resolutions (e.g. "I will contribute 20 dollars to Pakistani earthquake relief efforts") , on the condition that x number of others do the same by such and such a date. To facilitate local community empowerment (e.g. "I will petition the city council about reopening the neighborhood community center if 15 others do the same) Pledgebank also allows you to search for - and receive email notification - of pledges in your particular community.