I think everyone can agree, a bike shed is going to be built, it will hold bikes, and very few people are going to make use of it. That said, how about trying a few competing solutions, out of trunk and letting everyone give feedback and or a up down vote on the various features after a bit of testing, and then moving on. Put a time on this, lets say give everyone 1 week to design and implement the basic features and then on june 1, a vote is held and that thus forward, this will be the design until such time it can no longer be considered.
Build the shed already, Sean