This doesn't:
https://api.twitter.com/1.1/geo/search.json?lat=-33.877221&long=151.206765
Note that the long/lat was found by running this query and taking results[0].geo.coordinates:
http://search.twitter.com/search.json?q=World+Square+Shopping+Centre
Can you please fix your API, or tell me what I'm doing wrong?
Thanks,
Alec Taylor