Digg announced today that it has tweaked its policy on the nofollow attribute on external links.

 "We’ve made a few changes to the way Digg links to external sites that may impact some folks in the SEO community," says Digg’s John Quinn. "These changes reduce the incentive to post spammy content (or link spam) to Digg, while still flowing ’search engine juice’ freely to quality content."

Retweeting is a phenomenon that has taken the Twitter world by storm. The concept began when somebody added the letters "RT" to somebody else’s tweet and posted it as their own. The idea caught on on a massive scale, and now there are services that utilize retweeting as the backdrop of their entire purposes. "Some of Twitter’s best features are emergent—people inventing simple but creative ways to share, discover, and communicate.

Update: Tr.im has apparently had a change of heart, and decided to remain functional. On the company blog, Tr.im’s founder says:

We have restored tr.im, and re-opened its website. We have been absolutely overwhelmed by the popular response, and the countless public and private appeals I have received to keep tr.im alive.

Update: Retweet.com is now live.

Original Article: First Twitter ignited the URL-shortening service fire, and now a similar phenomenon appears to be happening with "retweeting" services. Retweet.com is reportedly set to launch today.

Google is traditionally the main area of focus when it comes to search engine optimization. With the search engine giant so far ahead of the game in terms of search market share, it’s not hard to understand why.

Links are what make up the web. They drive traffic to sites. They add value to articles. While some content providers may prefer not to have a lot of links to their content, most strive to get as many as possible.

SEOmoz has a couple of very interesting charts showing the top 500 domains and the top 500 pages being linked to from different places. This paints a pretty good picture of what sites are held in the highest regards by content producers.

Be glad if you’re not running a website, blog, or forum in Australia right now. If you linked to the wrong website, a site on the Australian Communications and Media Authority’s secret blacklist, they can fine you $11,000 ($7,262 US) per day that link stays live.

As you may or may not be aware, Google recommends keeping the number of links on any given page to under 100. This recommendation can be found among Google’s webmaster guidelines under the Design and Content Guidelines section.

Aaron Wall knows a thing or two about SEO. He’s been in this game as long as I can remember. He’s the brains behind the hugely popular SEOBook. When he talks about ways of getting links, people looking to increase their search engine rankings should pay attention.

Our own Mike McDonald scored an interview with him out in Las Vegas while attending the PubCon conference. Video of that can be seen below.

Bloggers and other web-based writers do a lot of linking. It’s great for the Blogosphere. In fact it’s really the only reason we have a Blogosphere. How often are our links misleading though? I’m not talking about "paid" or sponsored links that are deceptive and just trying to go after a click. That’s another issue entirely. I’m talking about just the everyday point-of-reference links.

YouTube announced today that it has implemented the ability to jump straight to any point in a video by simply adding a few extra characters at the end of the video’s URL. The YouTube Team explains on the official blog:

To create a deep link, append the following to the end of a YouTube video URL: #t=1m15s. This says to link to the time 1:15 – you can replace the numbers before the ‘m’ and the ‘s’ with anything you like.