As I had suspected, yellow gold seems to be making the big comeback. Look at Anthropologie's selections in jewelry, almost all yellow gold.
Which brings me to my two theories of jewelry.
1. You must choose between silver and gold, pick a favorite and be married to it. ( I don't like mixing so much).
2. (this is my favorite) Really every married woman needs two wedding rings, to keep current and everything.
Do you think that idea will fly? See the swallow here.