We travel quite a bit..for work and for leisure...so when it comes to bringing our electronics, we often have to find the right plug converter. A trusted website that we always buy from is DealExtreme. It has great prices for a variety of accessories. This has to be the best deal we've seen for a portable universal travel plug - especially compared to the prices at the airport ! It converts for US/UK/EU and AU plugs.
This product works and for that price, it won't hurt your wallet when you lose it during your trip !
If you're planning to buy from DealExtreme, be sure to buy a month ahead of time as they take a while to ship...at least from my experience (but maybe because we also don't pay for express post!)