Those rumours have no substance and are completely false.
After nine years flying it never ceases to amaze me that cabin crew can make such large rumours out of nothing. Just because Link crew change the colour of their scarf they are, suddenly, about to endorsed on 737s (but only the -400s!) to do mining routes??!
This is not a slur at any of the above posts. Just an observation and rant at how dangerous it is to have demotivated and bored flight attendants.
I agree with the idea that Qantas will, eventually, order a large regional jet to replace some 737 East Coast flying (similar to the East Coast 717 operation of a few years ago). In my opinion this should have been done already. But that strategy is a completely different kettle of fish to bored flight attendants playing CEO.