An url shortener allows you to create shorter URL’s and (sometimes) keeps track of how many times a link has been clicked. On the other hand, relying on third party services may have quite a few side effects.
According to Jeffrey Zeldman the solution is rolling your own mini-URLs [which]
lessens the chance that your carefully cultivated links will rot if the third-party URL shortening site goes down or goes out of business
If you are running for Wordpress there are two solutions available, both in the form of installable plug-ins.
One is the Short URL Plugin which Zeldman recommends.
The other is La Petite Url which, John Gruber notes, includes support for Short URL Auto-Discovery.
The social aspect of Delicious has (finally) got a little boost.
Now you can “send” bookmarks from Delicious not only to other users who are in your network but also as a message on Twitter and via e-mail.

Here’s how the two options look like.
To send a link to Twitter you have to login to your account.

And here’s the e-mail forwarding. The form states that Delicious will remember and list e-mail addresses, in the same way it now does users from your network.

Using the command line
/Applications/Chromium30196.app/Contents/MacOS/Chromium --enable-extensions
looks like I was finally able to install the Unofficial Chrome Delicious Extension on Chromium 3.0.196 for Mac.

More on this later.
The extension has been installed and loaded but doesn’t appear to be working. :(
In the Rule Torrent of Wired’s “How to Behave/ New Rules for Highly Evolved Humans” I noticed this line:
Tag Flickr photos freely—there’s no such thing as too many tags
On the same note here’s Joshua Shachter in 2006 speaking of tags on Delicious:
[...] letting people use their own tags–instead of choosing them from a menu he provided–would make del.icio.us more likely to be genuinely useful. Each person who uses del.icio.us is effectively coming up with an idiosyncratic system for classifying the Web: an article about, say, Dallas Mavericks owner Mark Cuban might be tagged “Mavericks” by one person, “crazy” by another, and “Mavericks” and “crazy” by a third. (Del.icio.us allows users to pin as many tags on a page as they want.)
Looks like in Mac Chromium 3.0.195 it is now possible to delete a bookmark from the bookmark bar by ctrl-clicking (or right-clicking) on it. :)
If I’m not mistaken links in webpages are now draggable although still can’t be dropped on the bookmark bar. :/

Here’s an example of a decoding of a PNG made through hid.im.
The decoding was done with the provided bookmarklet on Firefox 3.5 and the image is an example provided by a Slashdot user at tech.slashdot.org/comments.pl?sid=1303479&cid=28703011
The torrent, by the way, is a prefectly legal OpenOffice.org 3.1.0 win32 torrent taken from the OpenOffice.org website.

Looks like although not yet ready, bookmark editing is coming up on the Mac version of Google’s browser. This contextual menu was not present at all a couple of days ago at the beginning of July (in 3.0.192) and popped up around the 7th of the month (with (3.0.193).
On the other hand there’s still no drag n dropping of links into the bookmark bar.