They aren't in Australia but they deliver......the new On-One 29er frames drop in a couple of weeks apparently. With swappable dropouts included. And rack mounts - that shouldn't get in the way of disc calipers. Or you can run V's...
The image is the 26 version...
Claim is that we'd be looking around low 200 pounds for the 29 frame plus another 95 delivery. Say AU$500 delivered?
It appears (OK it is my strong suspicion) that these frames come from the same Maxway factory
http://www.maxway.com.tw/ in Taiwan as most of the other frames already mentioned in this thread.
They are also going to repeat the Frame Bundle offer
http://www.on-one.co.uk/i/q/ZXOOINBRED12/on-one-inbred-swap-out-dirty-dozen-bike-bundle that they have for the 26 frames which gives you a 10sp SLX group and all the single speed bits as well for about AU$1,500 delivered. Bit more for the 29er?
However, I think you could do much better than the frame bundle by judicious local and UK/US shopping for the add-ons....