breast cancer organization to benefit?

do you know a good breast cancer organization to benefit?
i'm excited to participate in a breast cancer charity fundraiser with fredflare.com (the cutest webshop in the world). i selected some beautiful scarves they'll offer in the fall, with the proceeds to be donated to a national or international breast cancer organization that promotes awareness, prevention + survival.

i suggested young survivor's coalition, but they say they "need a $5000 minimum donation commitment" which we can't guarantee.

can you help me pick another charity to benefit?