Blogs nofollow attribute

Hey people

What the reason for many blogs no follow attribute on comments and
links ?

Cheers
Jakob

Replies:

Re: Blogs nofollow attribute posted by Borek on Fri, 28 Apr 2006
- Re: Blogs nofollow attribute posted by Roy Schestowitz on Fri, 28 Apr 2006
- Re: Blogs nofollow attribute posted by
Re: Blogs nofollow attribute posted by Big Bill on Fri, 28 Apr 2006
- Re: Blogs nofollow attribute posted by
  - Re: Blogs nofollow attribute posted by Big Bill on Sun, 30 Apr 2006
    - Re: Blogs nofollow attribute posted by
      - Re: Blogs nofollow attribute posted by John Bokma on 30 Apr 2006
Re: Blogs nofollow attribute posted by John Bokma on 28 Apr 2006
Re: Blogs nofollow attribute posted by Rob on Sat, 29 Apr 2006