I've got four blogs at the moment though I only update one of them every day. They are used to try and make some extra money. I've made $600+ since I started them 12 weeks ago.
I have three blogs.
ffnstuff.blogspot.com about fantasy football,
blogaboutyourblog.blogspot.com where you can promote your site
and bloggingaddiction.blogspot.com my own personal blog that has random things in it lol