I don't usually go for Aussiebum stuff, but I bought some of their swimwear to try out and it's actually really comfortable and well made. The material is good too.
Some of the swimwear have been discounted by 60%.
For example, http://www.aussiebum.com/swimwear/swish-aero/2657 - Only $16
Pretty handy to wear under the boardshorts too.
They look the same, how do you tell which is which?