Spotted a guy giving these out for free at the entrance/ crossing near Eastland. In addition to free fruit from the Metro staff - makes a good brekkie the Ozbargain way.
I got myself a passion fruit flavoured one.
EDIT: Reposted 8/12/16 - the Chobani truck is at Ringwood station again! Looks like there's heaps more to go around - this time it's the drink type rather than the little tubs.
Grabbed a Coconut oats yoghurt at the Eastland side entrance and another one at the top of the staircases between platforms.
Enjoy.
Strawberry for me..