These sites worked fine.
EFF is a nonprofit group of passionate people — lawyers, technologists, volunteers, and visionaries — working to protect your digital rights.
Creative Commons provides free tools that let authors, scientists, artists, and educators easily mark their creative work with the freedoms they want it to carry.
Lustgarten Foundation for Pancreatic Cancer Research.
These sites had system errors and donations were not processed.
Doctors Without Borders is an independent international medical humanitarian organization that delivers emergency aid to people affected by armed conflict, epidemics, natural or man-made disasters, or exclusion from health care in more than 70 countries.
Update:
Works on a Mac on Safari, not on Firefox 2.0.0.1 on a Mac.
Jimmy Fund for Cancer Research at the Dana-Farber Cancer Institute.
I've notified them. It's a bad time of year to have your donation processing platform go down.
Update:
Jimmy Fund page works on a Mac on Safari, not on Firefox 2.0.0.1 on a Mac.