Hi Marcio
It looks like a great unit. I've used a mates Nikon 1 (the regular model not the new AW) and it handles really well and takes great pictures. The waterproofing should make it perfect for fishing photography. I like the look of the rubber armour that you can get as an accessory, should be good for fumbling around on a boat with wet slimy hands.
The only thing that concerns me is that it could be near on impossible to change lens in the field without getting salt into the sensor. Not that there is much of a selection in WP lenses yet. I would be inclined to put the zoom lens on and leave it there.
The only thing I would like more is shooting in raw (for editing later) but I don't think any other WP compacts offer that either. Also a wider angle lens would be great, which again I don't think any other WP compacts offer either. At least having interchangeable lenses means that a true wide angle may be a possibility in future if the AW concept proves popular.
If you want a camera with more 'pro' features however, you're best off looking at the Canon G1X or G15/G16 in a WP housing, like James mentioned.
Cheers
Duncan