I read quite a few blogs, too many to list in one go.
I'll update this page properly soon but as a start, you can't go far wrong with:
First Time Daddy: http://first-time-daddy.blogspot.com/
World of 0ddness: http://www.0ddness.co.uk/
DaddyNatal: http://www.daddynatal.co.uk/
The Perfect Bad Mummy: http://theperfectbadmummy.wordpress.com/