Ok, I clearly misread the information (not to surprising, I misread things every day...) and the "independant" category just splits your funds raised among all the major groups registered. We would need to have $17,500 to get POIS as a major group ($35,000 total with UPenn matching the donation).
This still wont change my desire to ride this race! I like to challenge myself athletically and I want to participate in an event that raises money and awareness for rare diseases! It costs $55 to bike the race, and I get to designate where the donated portion of my money goes. I will pick the Penn Scientists for Orphan Disease Research (NORD is also active in the "orphan" area, lobbying for Orphan Drugs that fail to be profitable for mass production to remain available).
Come on, someone has gotta have a bike, a good attitude and wants to meet another POISer!