Check in for both John XXIII and B&G is at at John XXIII and starts at 2pm on Sunday. If you are intending to check into student accommodation after 6pm on Sunday, you will need to call our accommodation monkey volunteer person to get your key.
On Sunday, conference registration is at the John XXIII accommodation (it will move to the Manning Clarke Centre on Monday) between 2pm and 6pm. It's a really good idea to register early, as registration on Monday will probably be really crowded.
If you are new to linux.conf.au, there is a welcome and briefing session on the Sunday that may interest you. This will be held at John XXIII at 4pm.