the Xperia active (sony) is waterproof, have some sport applications built-in,, should be able to update it to android 4.0 (like all the xperia), not the state of art of a smartphone but geared toward sports, u can probably find some sport appl on the android market.
otherwise the galaxy S3 and a waterproof pocket, the best smartphone so far (might be too expensive?)
i just keep my samsung B2100, it survived 3 weeks, lost in the snow and -5°C, and found by elders, they phoned my GF back with it
but unfortunatly, dropped it in the lake too, fell from moto riding and 2 cars passed over it , not a smartphone.
if i can get a smartphone version of that cell phone, i d go for it