I've been taunting Azzure with this possibility, and it's amusing enough that I must share it more widely. It's hypothetical on several levels, but just play along.
Gamers in Oz and NZ have long been vexed by Blizzard for never setting up any SEA b.net servers. They have to connect to USWest, which is like 8000 miles away across the Pacific, or else to Korea/Singapore servers, which are geographically closer, but generally have worse lag and no shared language. Sux to be them.
D3 they should have better luck playing thanks to the various anti-lag measures included in the game. But where it gets interesting is May 15th. We don't know when D3 will become available, and Bliz hasn't issued any useful clarifications, but recent semi-official rumor was that it might be midnight at the local time for every region around the world.
I find that unlikely, if only because US West coast is behind almost every other region on earth in time; it's -8 GMT; Europe is 8-10 hours earlier, Asia is 16-19 hours earlier, etc. Basically, from Irvine it's almost always tomorrow in China/Japan/Oz/NZ, etc. And it seems weird that Bliz would launch D3 everywhere on earth 8 to 10 to 20 hours before it launches in their home region. (The fact that I"m also in that time zone might be skewing my objectivity on this point.)
Still, just imagine if D3 does launch worldwide at midnight May 15th, local B.net server time. Aussies are around 19 hours ahead of USWest coast, but if their "local" server is assigned as USWest, they'd have to wait 19 hours, until evening on the 16th, to start playing. Meanwhile, people in their approximate time zone in korea, china, Japan, etc, would already have level 40 or 50 characters, since they have their own B.net servers and would have been playing since midnight the night before.
Aussies and Kiwis have long been infuriated by their lack of B.net servers... but that would be the final straw. As I told Azzure, that would be the longest 19 hours of his life, at least since the last Yahoo Serious/Crocodile Dundee movie marathon.