First, when you visit the site and look at the latest links shared by people there is now a “Related Tweets” feature that works in an interesting way. It doesn’t actually aggregate tweets that point to that specific link but instead mines keywords from recent tweets that match those in the headline and tags and displays those. So the entry there for TechCrunch’s “How I Learned to Quit the iPhone and Love Google Voice” shows a series of tweets from people discussing iPhone jailbreaks, Google Voice App rejection controversy and more.
Second, when you save a new bookmark (either on the site or with the browser bookmarklet) you can not only save it and tag it as usual but also send it to other Delicious users, post it to Twitter (after putting in your login information) or send it to your friends via email.
On the one hand this is another example of how more of the social web services/sites we regularly use are duplicating features and functionality already found elsewhere in an effort to get more of our attention. You can comment on an item in about 78 different places, you can Tweet from most of the URL shorteners and many other sites out there.
The one area where what Delicious has done differs from most of that duplication that’s gone on is that this one doesn’t come with yet another set of metrics that needs to be taken into account. There’s nothing added that needs to be measured since the “Saves” count isn’t impacted and the comments aren’t happening on Delicious but are still solely on Twitter. That’s kind of a relief if your primary focus is on counting how something is happening in the online space.
I don’t see this as being a massive shift away from Delicious’ core functionality but instead simply another way to share what you’ve found interesting on the web and see what others are saying.