I am scratching my head a little at this. Why would they wan tto use ripple, a fairly obscure crypto instead of one with a higher market cap such as litecoin or bitcoin? Maybe Taun is correct and it is just a pump and dump. If so not a bad time to put a few pennies in I guess, but its easy to get burned if you are not careful.
Ripple has been around since 2004 and if something couldn't take off after 10 years, it probably never will. It's another MaidSafe, one of those vaporware scams which promises the moon and earth to their investors and then proceeds to live off said investors' money - very lucrative game.
In Ripple's case, if you look back years, you'ld know that they're nothing but serial liars. Like they made the claim for the longest time of exclusive relationship with 'big banks' but it turns out they were referring to Fidor (which isn't really big big) and Fidor was actually pro-BTC, not pro-Ripple, and today Fidor does nothing with Ripple anymore and instead partnered with Kraken.
For this Australian bank thing, as much Coindesk likes to construe reality, it was probably some 2 hour tech demo to some bored middle manager who has since forgotten about the tech demo.
That doesn't matter though, as the intent is just pump and dump with articles promising the moon and earth and Ripple has been master at this since 2012.