Here you can access to the following links to check out some blogs:
Personal:
http://lorelle.wordpress.com/2009/04/08/example-of-a-perfect-personal-blog/
http://vikkichowney.com/
http://mehmens.blogspot.com/
Educational:
http://weblogg-ed.com/
http://theopenclassroom.blogspot.com/
http://www.leekrausonline.com/
http://weblogs.hcrhs.k12.nj.us/bees/
http://www.ogps.wa.edu.au/
http://anne.teachesme.com/
http://blogs.law.harvard.edu/houghton/
http://parked491.blogspot.com/2008/03/week-1-educational-blog-examples.html
http://galileoweb.org/
Business
http://www.freakonomics.com/blog/
http://www.scottishlife.co.uk/scotlife/Web/Site/BeeHive/BeeHiveHome.asp
http://www.pharmalot.com/
http://priceofoil.org/