What's wrong with your cell phone?

If you want one that can take a splash and some and a bit of trashing you should go shopping for a second hand Ericsson R310. Problem is I don't know if it was ever sold in the US.

Even if ruggedness is not what you look for but you want something that's actually a good phone rather than a media player/camera that can also be used as a phone, I would also recommend that you look for phones 4-5 years old. Radio performance and battery life has gone down-hill since then.

/Martin