I read not too long ago that CA is the 5th largest economy in the world. That's pretty impressive, considering it's a state in a country, as opposed to a country in and of itself(although i'm sure quite a few people might prefer the latter). Considering the diversity of it's contributions to the internal and especially the national/global economies, it probably has a lot more in common with a country competing in the world economy than a state. With that being said, it might be able to function on it's own, but I really do doubt it would ever happened.
PR should become it's own country if it's inhabitants so choose, but that's not likely because of US pressures and influence on the island. We certainly have our interests primarily in mind in maintaining the relationship we have with them currently. Independence is not likely, and neither is statehood for that matter. It is a shame what the bombing has done there, though. I don't recall if it's on the main island itself, or a near-by one, but I know that it's been having an effect on the cancer rates for a lot of populations in the surrounding areas because of the wind carrying the chemicals released in explosions during military training ops.