This is the most obvious one: http://mummums.com/ At one point, you could even find it in WholeFoods.

I'm sure there are more in terms of processed food. I used to look at processed food packaging for babies and toddlers very closely. There are actually a lot of processed foods where the country of origin is just not listed. If you read carefully most of them just list the country where the food was packaged and not where the ingredients were sourced. When you call them to ask, their customer reps have no answer. Emails go unanswered as well. It could also be just be sourced locally, but they just suffer from a lackadaisical PR dept.

I wouldn't be surprised if cod & tilapia from China end up in the US restaurants and supermarkets as well