My wife has a pair and wears them when we go fishing or as a talking point at various events. She even caught me looking at her ear one day when I had forgotten my spare lure box, but quickly shut me down with a "don't even think about it."
I am not really sure where you can get them from (if you know please leave a comment). I think my wife got them from our local jeweler, but we do live in a fishing crazy town. I saw a set of spinnerbait earrings on ebay the other day, which were so cool and this was the catalyst for this post.
There are more and more women getting into the sport of fishing and as this number grows you can expect to see more accessories targeting this market. Lately I have noticed more pink fishing rods than ever before and I read that one of the major tackle companies are donating some of the profits from these rods to breast cancer research, which is really great to hear.
Here are some of the cooler ones I found while searching the net:
I love these ones apparently they are "fun and waterproof" :-)