I've had various emails over the last couple of days confirming that Australia's Channel 10 has started airing televisual advertisments for Torchwood. They include the tagline "Captain Jack is coming!" - but spoil the end of "Everything Changes", so spoilerphobes beware!
Though no date has been fixed for the series launch on the network, a mid-June launch is likely.
Keep a look out in local listing magazines for updates on broadcast dates.