B738 VH-VXH on QF455 (2 May, 1730 hours SYD - MEL in the sky at 1815) is arriving at 1940, 35 late. The next southbound, QF457, the 1745 was airborne at 1836 so a 37 late arrival (1957) is expected for B738 VH-VXA.
QF477 on the same route, the 1815 hours has VH-VXN and took off at 1910, so it should be at its MEL gate at 2030, 40 late.
The number of minutes of delay is similar to a Mensa test sequence.
QF1407, the 1725 hours SYD to BXG was showing as an amended 1745 hours departure but became a cancellation. This may be the first time it's been cancelled. QF1408 back from Bendigo to Sydney tomorrow morning is delayed until 1120 in its departure, with arrival at 1315, three hours late ('normal' departure time tomorrow was displaying as 0825, later than usual). For this flight to run tomorrow morning, there must be a ferry flight (presumably from Sydney).
Friday 3 May is showing QF11 (0935 hours SYD - LAX) as delayed by 25 minutes in its departure. This may be separate from the badly delayed (overnight) QF12 that's presently still in LAX, but due to depart at 0900 hours LAX time on Thursday.
UPDATE: The tardy Thursday night QF3 pushed back in SYD at 2019, 64 late with same day HNL arrival estimated as 0917 hours, 47 late. For the second consecutive night, it's B744 VH-OEE.
FURTHER UPDATE: In his first contribution - a great one at that - AFFer dylarr advised:
Interesting. I noticed this too. Anyone know the reason it QF1407 SYD-BXG was cancelled? You're right in that this is the first time there has been a cancellation on this route.
As for the ferry flight, they're operating it as a scheduled flight QF1409 SYD-BXG (0900-1100) which they are selling tickets to on qantas.com. Once it arrives in BXG it will turn around 20 minutes later to operate as QF1408 BXG-SYD (1120-1315).
The regularly scheduled QF1407 SYD-BXG (1825-2025) also operates later on in the afternoon, but looking at the availability it is completely sold out.