Spam Karma for me is the most effective comment and trackback spam management solution because it doesn’t cause me problems with false positives on many blogs where I comment on a regular basis.
As a blogger, it is a huge time saver by sending me email notifications a few times per day if it finds entries that are “possible” good comments and trackbacks, but which tripped up one or more of the various algorithms it uses.
Read more on Akismet False Positives & Spam Karma Configuration…
Why You Should Nofollow Your Blog Comments?
Dave Naylor seems to think it is a good idea to nofollow blog comments.
In many ways he is right:-
It takes additional time to manage comments on your blog even when you set up Spam Karma effectively, but that is something you could outsource to compensate, or have managed by a more junior member of staff.
You also leak a little bit of extra juice, how much depends on your site structure, and how many comments you get. Some people prefer to have huge blogrolls of the people who buy them drinks at seminars.
What Do You Gain?
I think the biggest gain is in community