They've got a website running now:

http://www.australianmotoringenthusiastparty.org.au/

Regarding preferences, this is a from a Facebook post:

Preferences are an important part of the political strategy. We have no agenda and decisions regarding preferences will be made in the best interests of the motoring enthusiast community at the appropriate time. Remember if you choose - you get complete control over where your preferences go, by voting below the line.
Sort of vague, but make of it what you will...