Massup.us Social Cycling System

massup.usThe massup.us smartphone web-app was conceived of and authored by bikegeek Andrew Bedno.  The application allows mobile smartphone users to seek and share real-time data on group rides.  Originally authored to assist the Chicago Critical Mass ride, massup.us now supports an arbitrary number of rides.  The application allows smartphone users to query current ride position, share their current position (via GPS data sharing), leave group messages, and more.  Additional information can be seen at the site's "about" page.