I missed this a few days ago
At the request of WhiteHat SEO community on April the 1st this year all major search engines including Google, Yahoo and MSN Live declared their joint support for a newly developed XFN standard.
The new attribute rel=follow is designed to complement the notorious rel=nofollow. However unlike nofollow attribute rel=follow is designed to express not negative but positive relationship between a linking website and a website rel=follow link points to.
I’ll try to explain it in layman’s terms…
Read more on Google | Yahoo | MSN | Cooperatively Introduce rel=”follow” tag…
Site Structure – SEOs Going Fishing Without Any Bait
If you don't know what you are doing with nofollow, noindex and robots.txt you can royally mess* things up (face to face I would use a stronger term). Even if you do know what you are doing, you can still mess things up.
I can understand why Matt Cutts might want to change what noindex does, it is not just Koreans making occasional mistake, for instance I just noticed the whole WebProNews video blog is currently noindex nofollow. I am sure that is a mistake, it is easy to make in Wordpress… just one click and save.
All in one