Steve - if IB (whom I use already) also covered Australian stocks (not just the large ones but all the mining stocks (which often move a lot) also) I would be committed for life. Australia has a dearth of brokers. Commsec is about the cheapest and they charge $20 each way on a stock trade and they need a personal reference to open a special bank account to trade with - so uncompetitive.
I trade options on the ASX although I keep an eye on commodities, bonds, fx, Dow and S&P 500. I also spec on penny stocks when theres high volume.