Blogger is something between a forum and an ordinary site. Visitors can put comments on written articles, you can invite them and they put in their own articles. They are collection of info. They are listed in Google like any other site.
I use Blogger.com because I was invited to write on one. It is simple to use. With Fantastico you can also install
b2evolution blog. It has many features - anyone tried it? There is a demo available, you can try its features online right away.