For all those that are after a 4G network there's now a cheaper offer about from Live Connected, however you must remember that 1GB of data isn't that much these days, especially on the faster 4G network and that for every MB you go over you're charged 50cents. Decent for emails and casual web surfing but no good for video streaming on the go.

Cut down costs of 4G network use:
Make sure you enable your own home or work wifi when in range for that sort of thing, also most westfields offer free wifi access; that's what I use when I'm out looking at shops for bargains. Here's the details of the Live Connected 4G network:

Mobile Plans 4G - Live Connected

$28 (S) - $500 Credit, 1GB
$30 (M) - $700 Credit, 1.5GB - Unlimited Standard National txts plus unlimited talk to Live customers - for the extra $2 this is what I'd go for.
$41 (L) - $900 Credit, 2GB - Unlimited Standard National txts plus unlimited talk to Live customers
$55 (XL) - Unlimited, 3GB - Same as above with - Unlimited Standard National txts plus unlimited talk to Live customers plus it gives: Talk and text to anyone Unlimited - Standard voice calls within Australia (local, national, GSM mobiles)Voicemail Retrieval 13, 1300, 1800