not only london, but before that there was one in Germany somewhere, and then I think France.
As yyler said, we don't have funds for a Euro Server atm, so we chose to do one more in the middle (NY). It's also more the fact that orgnaizing European Gamedays after a while was harder than US gamedays, alogn with getting a good turnout during those gamedays.
The reason you don't see a lot of Australian servers is because (from what I can tell) it costs more to run an AU Server, than US or EU.... also, we don't really need one.