When I show the news about Haiti earthquake, I tried to donate money online, I got the link on EV to WorldVision online donation page. I've heard about it before and like their concept very much, but never register.
When I try to donate, a information shows that I have to login/register first. ( I though... but I only want to donate money for this time and I really want to do it as fast as possible since the people in Haiti are waiting for help. ) I try to register by fill in personal information, I didn't get the membership right away.
After I become a member, I try to start the donation, when I finished filling all the information and press the donate button, information pop out and said it only work inside the U.S, I was really disappointed about that ... they should as least tell me this at the very beginning but not the very end.
I visited UNICEF website and donated without register in 2-3 min.
For me I think how to make the donate and contribute process easy and user friendly is also very important both for an organization and the user especially for a new potential user. Sometimes less is more.