I'll tell you what, we had a bike sharing program over at Davidson College, by the end of each semester those bikes were unridable. Be prepared for some heavy maintenance fees and liability issues.
Thanks for the feedback. We've actually been operating our largest program for over a year now. Also, many new, specialized bicycles designed for bikeshare use now exist. We definitely don't want to use $100 Walmart bikes. We make sure the bicycles are up to certain standards for durability and rider comfort, and perform regular and as-needed maintenance.