I've got a site where I occasionally write a blog and also upload new docs for people to download. I would like some sort of feature/button on the blog page and on the download page so that people who wish to be notified when I write or supply fresh content are emailed. Thus I think I require a box where they input their email address and then a click a subscription button. I don't really want an RSS button since I think people don't often check their RSS feeds (correct me if I am wrong but do you get a notification if you subscribe via RSS?).