Pinterest is visually pleasing site for collecting photos and links to stuff you like and sharing them with others. While there are tons of other options for social bookmarking (e.g. Digg and Reddit), Pinterest's visually pleasing interface has made it a great hit.

Windows/Internet Explorer only: Yahoo has released a beta version of their browser plug-in for social bookmarking tool del.icio.us for Internet Explorer. It'll look pretty familiar to anyone who's used their del.icio.us Bookmarks Firefox add-on (original post), with toolbar buttons for quick bookmarking and tag browsing, and complete integration and syncing with local bookmarks. It's still faster and more convenient than heading to del.icio.us or utilising tag-required bookmarklets, however. The del.icio.us add-on runs on Internet Explorer 6, 7, and even the IE8 beta on Windows XP and Vista.

Mac OS X only: Browse your Del.icio.us bookmarks like never before with freeware beta application Delish. URLs weren't mean to be viewed as text, according to the minds behind Delish, so the software provides a visual interface for your bookmarks by creating thumbnail snapshots of all the links, which it displays in an attractive, easy-to-use interface. Delish even supports multi-touch pinch and scroll gestures for owners of new MacBook Pros and Airs—though unfortunately you can't create a new bookmark with it. Delish is currently freeware, Mac OS X only. Delish

Google adds yet another social-ish function, "Notes," to its Reader feed-browsing tool. The practical use comes from a new bookmarklet that posts whatever page you're looking at to your shared Reader items, with your own notes attached. You can also post notes with no link at all to be shared with your "friends," making it a kind of Twitter clone for, well, avid feed readers. As one blogger points out, savvy note-sharers can also alter the basic text of anything they share, so it might pay to double-check permalinks on shared items. Are "Notes" and the sharing aspects of Reader something you're enjoying, or needless biting from the Web 2.0 aesthetic? Let's hear your thoughts in the comments.

Social bookmarking service del.icio.us has updated their extension to work in Firefox 3, even though Firefox 3 has bookmark tagging baked in. The extension release is beta (as is Firefox 3, obviously) so testers, give it a whirl.

Having an easily-accessible wish list means not having to be unpleasantly surprised at your friends and relatives' ... creativity when a birthday, holiday, or plain old surprise rolls around. Rather than creating separate, often hard-to-find wish lists on sites like Amazon or Newegg, del.isili.st can pull any sites you've tagged on social bookmarking site de.icio.us with the phrase "wishlist" and display them on a clean, white page of links. The main drawback is that you have to keep the del.icio.us links public, so anyone could potentially see your material goods fixations, but most wish lists are public on other sites anyway. Del.isihli.st is a free site and requires no sign-up. del.ishli.st

Windows only: Freeware application Netlicious is a desktop Del.icio.us client from which you can view and manage all of your Del.cio.us bookmarks. The application is set up very much like a traditional desktop newsreader or email application, with all your tags in the left sidebar, individual bookmarks in a top pane, and a browser preview for bookmarks below that. Netlicious makes viewing or editing your bookmarks a breeze, with a quick search integration and everything else you'd want from a desktop Del.icio.us tool. Netlicious is freeware beta application, Windows only, requires .NET 2.0. Netlicious

Many of us Lifehackers are big fans of the StumbleUpon toolbar for Firefox and Internet Explorer, but what about fans of Safari, Opera, and other browsers that want to happen upon peer-approved, wicked-cool web sites? The Digital Inspiration blog points us to a "virtual toolbar" offered by the site that works in most any modern browser—including the iPhone/iPod Touch version of Safari. Simply head to the link below, and the StumbleUpon toolbar should stay at the top of your browser for that session. For an in-depth look at just what StumbleUpon does, check out this Technophilia tutorial. StumbleUpon Demo

Web site ReadBurner aggregates popular Google Reader Shared Items, turning Google Reader sharing into an action similar to bookmarking a page on Del.icio.us or voting for an article on Digg. Sure you can already share your favorite news items with friends, but by adding your shared items URL to ReadBurner, sharing feeds will also give that link some juice on ReadBurner—so it's like a simple way to contribute to a social bookmarking service without really adding a step to your bookmarking. So far the site's fairly young, but with enough users it really shows promise.
ReadBurner

Laurel Papworth has written up an interesting review of online identity manager ClaimID, which she says is a nice social aggregator of online identities. "Think of ClaimID as a social bookmarking site for identities
and profiles. You link to your profile page or account login on some
other site and then bookmark it. There's a hidden/private field and you
can choose whether to turn the API functions on or off."ClaimID uses OpenID to let you verify or 'claim' pages and profiles about yourself online, providing a central repository for yourself or others to search (portfolio 2.0?). It also has the handy bonus of having a private field for password hints, so you can use it as a reminder for the passwords for the sites you visit infrequently. My Social Identities: ClaimID

Web app Twine (currently in closed beta) attempts to bring social search and bookmarking tools to the wiki, which sounds like an interesting combination. The app offers personal or group knowledge management for sharing, organising and searching for information, includng bookmarks, images and videos.

Web Worker Daily wrote about Twine the other day, and described it like so:

"A 'twine' is similar to a wiki, in that it may be specific to a certain subject or project, can have multiple members, allows for permission-based updating, and supports moderation. You tag the content you add to Twine, but the twist is that it tags your content too, by using natural language processing to figure out what it’s about."

Twine is in private beta at the moment. However, I got in touch with Twine PR to find out if it would be a free or paid app. The word came back that Twine will always offer a free (ad-supported) basic version, as well as a subscription-based professional version. Good stuff.

 Twine for Personal Knowledge Managment but Not Yet