Got this email and according to snopes.com it is legit so click today:

The Breast Cancer site is having trouble getting enough
people to click on their site daily to meet their quota of donating at least one
free mammogram a day to an underprivileged woman. It takes less than a minute to
go to their site and click on 'donating a mammogram' for free (pink window in
the middle). This doesn't cost you a thing. Their corporate sponsors
advertisers use the number of daily visits to donate mammogram in exchange for
advertising. Here's the web site! Pass it along to people you know.

Donate a Mammogram