Looks like a nice little unit: 250GB, USB2.0, &c.

As part of Breast Cancer Awareness Month, WD will make a dontation to the National Breast Cancer Foundation for each pink Passport drive sold. Going one step further than most, WD’s donations will continue beyond month’s end – they will continue until February 29.

From http://pinkforoctober.org/:

Web sites will Go Pink during the month of October to bring attention to Breast Cancer Awareness Month, get people talking about breast cancer, and raise money for research.

But to be clear, raising money isn’t the primary purpose of this web event.
The hope is that you turn your site pink (in whatever way works for your site), go out to that World Wide Web thing and educate yourself about the multiple issues related to Breast Cancer, then take that newfound knowledge and tell someone else what you’ve learned.