Australia, New Zealand & the South Pacific - Mobile ad car rental in SYD

I've heard from a couple people that there's an outfit in SYD that rents out Smart cars for about $5/day, provided you drive a minimum of 40km and maxiumum of 80km. They're basically mobile adverts for certain companies. Anyone have a link to the website for this company?

Thanks.

http://www.kahdo.com.au/kahdo.htm