While reading about my previous post, I ran across the following site: L2 Cup. This is a proposal for a crewed space race similar to sailing races here on Earth. I mentioned the proposal in my list of LEAG posters and talks related to prizes, but I didn't know about the L2 Cup web site.
The idea reminds me of a book I read long ago of short stories featuring solar sails: Project Solar Sail. The book sales were supposed to help fund a solar sail race.