We have plans to allow for Oceanic players to choose which region they want to play in. This is something coming in the future. You'll have two separate licenses and can choose between North America and Southeast Asia. This still means you will be unable to communicate with players on Southeast Asian servers if you're connected to North American servers. It will be one or the other at any given time, but we at least want to give Oceanic players the option.

Cross-region gameplay and communication is something we'd absolutely love to do, but the technology isn't quite there and our infrastructure is not set up to communicate that way. That kind of set up would require a huge undertaking and likely result in unacceptable latency in this day and age. That said, we look forward to the day when we can create an even more interconnected global community.

As far as chat room, chat channels, and clans go, it's important to bear in mind that we recently redesigned Battle.net from the ground up to create a new social framework. Much of this effort has been to offer updated, improved, and expanded features to the StarCraft II community. With that said, the game has been out for three days. We will continue to iterate upon Battle.net in the weeks and months ahead. It shouldn't be assumed that because a feature feels missing now, it means we don't have plans to add it later.
                               
Country Manager Zarhym