Makesolutions.net

This one is worth waiting for: Twine. Still in private beta, at its most basic it is shared bookmarking service. But it blends in additional concepts from newsgroups, forums, social networking sites, online databases, and wikis. There's a lot of semantic Web theory (and technology) underneath the interface, which still needs to evolve a bit, but even in this early stage it's a compelling product.

We have 100 invitations reserved for Webware readers: Use the form at the end of this post to get your own.

Twine uses item metadata as well as natural-language processing to extract tags from items you enter.

Twine lets you create or participate in topic areas called "Twines." Into a Twine its users post Web addresses, photo and video links, files, and text comments. Twine goes to work analyzing the items and automatically figuring out tags for them. For example, when I created a "Web 2.0 reviews" Twine and added Webware, it automatically and instantly tagged it "applications," "business," "silicon valley," and so forth, which are keywords that Webware.com pages has in its HTML source. The service also tries to to divine meaning from the pages and add its own tags, and it attempts to figure out the people and the locations associated with an item, and put that information in as well.

From all these tags, including tags that you manually attach to stories, Twine will then look up items that it thinks you will be interested in, as well as other Twine members that have similarly-tagged items in their portfolios. It also uses the strength of your connections to various other members to weight item recommendations.

The upshot of this is that its recommendations should be pretty good. Immediately after I entered in my Webware link, Twine recommended to me a video of Eric Schmidt (Google's CEO), a review of the Web 2.0 Summit Launchpad, and other items I thought I should definitely check out.

It's easy to get items into Twine. There's a bookmarklet that grabs URLs and images, and, if the item comes from a source like Flickr, YouTube, or Amazon, additional metadata as well. You can also email items into Twine, either to your own (or other peoples') unique Twine address or directly into a topic Twine.

Each item also gets a discussion thread, or you can make a discussion an item itself.

In a nutshell, Twine builds a semantic web (small w) from all the items, people, collections, and tags that are contributed to it. I think it does a killer job of weaving everything together. However, it's a rough cloth. The user interface appears straightforward at first blush but it takes some study to understand what's going on and how to exploit it. And as other writers have said, even at this early stage, with only 30,000 users onboard, it's easy to see how Twine could contribute to personal information overload.

The database that Twine builds is as open as the company can make it. All pages can alternatively be viewed in machine-readable RDF format, and a two-way API is forthcoming. That's pretty cool, although Twine is neither a general-purpose social site like Twitter nor a database like Freebase, so I'm not sure who's going to bother creating apps for Twine. Though if the the social aggregators (like FriendFeed and Plaxo) want to do so, Twine's open strategy should make it easy.

A "Twine" in the system is where users can add items and discuss them.

See also: JetEye, Plum, Squidoo, and of course Delicious.

Want to try it yourself? No word yet on when the site opens up to public beta. But the first 100 responses to this form will get added to the private beta in the next round of invitations the company sends out:

Fill out my Wufoo form!