iPhone 3GS dropped in the pool. Still works!

Was trying video on my new iPhone 3G S at the pool and dropped it in the pool. Don't know if it's waterproof, but it still works fine. I had a few people comment on seeing a strap in the video. I have a rubber cover and had put a strap through the earpiece hole to avoid just this type of thing. I didn't have it on my wrist at the time, but believe me, I will from now on!!!! Maybe the rubber cover helped with it not getting damaged.