I see the odd tourist riding around on the Melbourne bike share bikes, but not many at all. I just came across this link that gives you live information on how many bikes are available at each docking station, it can also give you a 48hr history which is interesting to see where the bikes move from and to during the day.
You can also see other cities, so looking at London's use is much more interesting as the program is actually used heavily in many places around the world.
