Works out to half price for data. The 8/16Gb is to do with their off peak (nightime) is twice the data per unit cost.
Other specials too, all about "half price" (Dodo price?).
I bought one of these for a bargain price from the OzBargain post:-
"Gigabyte G-Style T1005M Multi-Touch Tablet PC $399 (+Shipping)" (http://www.ozbargain.com.au/node/49446)
I've been lurking for ages, searching the "Deals" and "Find Me A Bargain" posts. Now I reckon it's time to see if there is a better way. :) What I've come up with from the RSS feed and searching is …