The Komen Foundation does amazing work. Not saying they're the only option, and it might be cooler to pool money and have a single tally we can all see when the money goes in. But if you want to donate to a great organization doing all kinda of breast cancer work in addition to research, here's a place:
https://secure2.convio.net/kd/site/Donation?ACTION=SHOW_DONATION_OPTIONS&CAMPAIGN_ID=1083&JServSessionIdr001=geubggjn62.app7bTom
Long time reader, first time post