Recently, I found out that Yarra Trams has published a web service interface for finding out information on tram arrival times. This is awesome, and I've been trying to think of cool little apps that I can write to take advantage of it. As I'm also playing with GWT at the moment, so perhaps I could do something that way... There is a problem however, in that the Same Origin Policy will block any attempts by my javascript code to access the webservice, as it will come from a different origin.