The BBC's released the trailer and title for this year's Christmas special, and it's reported we won't have to wait too long to see it here in Australia, either. Also, that costume that the BBC's auctioning off? Matt Smith is... ahem... not wearing it. If you know what I mean. The Christmas special will be titled "The Doctor, The Widow And The Wardrobe" — a truly subtle effort on the part of Steven Moffat there, and will be broadcast in the UK on Christmas day.
Meanwhile, for the Children In Need Telethon, Matt Smith recorded a brief snippet promoting the auction of the Doctor's outfit and its logical conclusion. If you're buying the Doctor's clothes, what exactly is he wearing?
As for local (legal) playback? The Doctor Who News Page reports that the ABC will show it on Boxing Day, which is reasonable — once you take the time difference into account, that's only about twelve hours behind the UK.