I have an advcash virtual card and have used it to pay for server hosting.

For the cheapest option for physical purchases in Australia, I have been using Coinjar Swipe.

I am happy with it. An ATO ruling states that in certain circumstances bitcoin used for private purchases in capital gains tax exempt. I think a card will make it easier to show that purchases are private in nature. So, I have been spending bitcoin with it for months now and it gives me satisfaction every time a transaction goes through.