I work at Dick Smith (who's owned by Woolies, and heavily influenced by its parent company when it comes to these things) and we've just had a batch of new employees come through -- as cro_angel said it's heavily region specific, from what I saw. Additionally there's an emphasis on young (cheap) labour, but that'll change depending on what role you're going for, and where (ie Woolies shelf-stackers has different requirements to Dick Smith salespeople).
My girl's brother was involved in the recent round of applications & overall they seemed to have pretty lax organisation. In hindsight, the online applications (we have them too) very rarely seem to get too far unless you've got the right timing, and you're the right person. My advice would be to introduce yourself to someone at the specific place. Official policy seems to be to direct people to the website, so do that too, but if they take your resume and it's then on their desk to consider you, all the better...