In the Winter, it seems traditional that Speed TV runs these at least infrequently. They are pretty exciting to watch. It's their version of NASCAR, but I think they're all run on street or road courses.
It's what NASCAR should be, IMO. Don't get me wrong, it takes talent to run around Daytona or TMS or wherever at speed in traffic. But, I do prefer watching road racing. I'd probably rather watch ovals than street courses, which are often too tight and plagued with yellows.
At any rate, the Aussie's are fun to watch. That's all I have to say about that.
PS- I do like the Porsche SuperCup races too, they take "rubbin' is racin' " to a whole new level. I only wish they (Speed) didn't cram the highlights of two different races in 1/2 hour episodes.