Australians, why we can't we buy online using our EFTPOS debit cards?

Factual Questions
1

We can use them over the phone with the BSB and account number, why not over the net?

2

http://www.eftpos.co.nz/articles/news270701.htm

http://www.eftpos.co.nz/ePOS/ePOS.htm#

Maybe the e-vendors don’t have the epos software in place to process the eftpost payments yet.