Have you seen J.Crew's new Swim Shop? Not only can you select by style, color and pattern, but they have a mix-and match widget that is totally addictive. You scroll through your filtered list and put together a perfectly mis-matched suit.
Pure design genius. (And that little sailor-stripe brief is currently my favorite bikini bottom of all time. Love it.
Once you put together a suit you are happy with, you can hit save, and they save it to "My Suits". Here are my current favs:
I mean really. If J.Crew wasn't addicting enough already. (And most of the pieces above are 25% off with the code SOGOOD.)
Shopping Enabler out.