Tip from me at http://rudefox.com

Blekko has listed content farms like eHow back.
Go to – > http://blekko.com/ws/ehow

You will notice that they have listed ehow.com back into their serps.

The reason for listing ehow back might be the news from latest google algorithm update since Mahalo which is another content site has not been added.

We're just showing it for the navigation result [ehow]. The site shouldn't be showing up for other searches.

Admittedly, this may be confusing, so to be clear perhaps we should toast the nav answer too.