the bike bucket locater has been formally introduced to metrofi. the in-transit reporting frequency should go way up now.
geolocation by wifi mac address has real utility. often the bike gps is out of range and wifi location would be less accurate but a lot better than nothing. its also useful for setups with no gps receiver at all.
wigle.net has no programatic interface. google has put out the world's largest datastore - google base - free for all to use. building a mac/lat-long database on google base would be cool.