<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by og:
It seems Check-my-trip only shows seat allocations for domestic OZ flights if they are Internationals (QF1-399). An upcoming SYD-MEL-SYD flight on QF 409 does not have seat assignment shown whereas the return MEL-SYD (QF180) DOES have seat assignment shown.</font>
That is because seat assignments for domestic flights aren't done by the computer until the night before travel.
A great way to do it, actually.
Dave