I want to cost the options for using GPS to locate a bus.  I have a
client in the UK who wants users to be able to see where their bus is
in realtime on their website.  I need a solution that will transmit
GPS data from the bus to our webserver, or allow our webserver to
periodically ask for the data.  I have the skills to then use this
data to integrate with Google Maps or a similar mapping solution, but
are unsure what hardware to use to get the GPS data.  Any ideas?