I happen to still have a spreadsheet of names from our first child and have added a few but we aren't really getting too into it yet because we disagreed on so many of them the first time we went through the list. I think we'll get more active with names after we know the sex.
Although, a friend is pg and due a week before me, I think she's all over names right now and keeps asking me about it. I suspect she doesn't want us to choose the same name options. I read my list to her once and she forbid me to use a few of them because she's got them on her list now. LOL She's crazy.