Kudos to Matt Cutts and the team at Google for finally getting around to adding nofollow documentation to the Google Webmaster Help Center.

Matt explains:

Earlier this year, Li Evans pinged us with a good observation. We've answered a ton of questions about nofollow in various places around the blogosphere. Li asked us to distill the important bits about nofollow into a single page and place it in Google's HTML documentation. We just pushed that live, so you can read more about the nofollow attribute if you're interested.

Since I spent some time yesterday writing emails to some bloggers I know trying to help them understand nofollow and how it impacts their ability to run pay-per-post and blogvertorials on their web sites, it's nice to see some of this information being boiled down and included in Google's Webmaster Help section.

The new info on the Google site clearly explains what nofollow is, how to use and when Google thinks you should use it. In fact, here's what the new page says about paid links:

Paid links: A site's ranking in Google search results is partly based on analysis of those sites that link to it. In order to prevent paid links from influencing search results and negatively impacting users, we urge webmasters use nofollow on such links. Search engine guidelines require machine-readable disclosure of paid links in the same way that consumers online and offline appreciate disclosure of paid relationships (for example, a full-page newspaper ad may be headed by the word "Advertisement"). More information on Google's stance on paid links.

Nice job pestering them into that move Li!

That's not all the info they've added though. According to Matt, you'll find new or updated Google info on a variety of topics, including a spiffy Robots.txt PDF for publishers and a revised definition of a Doorway Pages.