[S]hortening services add another layer of indirection to an already creaky system. A regular hyperlink implicates a browser, its DNS resolver, the publisher’s DNS server, and the publisher’s website. With a shortening service, you’re adding something that acts like a third DNS resolver, except one that is assembled out of unvetted PHP and MySQL, without the benevolent oversight of luminaries like Dan Kaminsky and St. Postel.
There are three other parties in the ecosystem of a link: the publisher (the site the link points to), the transit (places where that shortened link is used, such as Twitter or Typepad), and the clicker (the person who ultimately follows the shortened links). Each is harmed to some extent by URL shortening.
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Here I am againg posting about the Mashable's Twitter Guidebook (2009 edition) made available for download on SlideShare with a new Adobe PDF file format which is causing many problems with embedding systems that forced me to delete my previous Posterous post and post again in this new "format".
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Everything they learned about social media they learned by reading blog posts (i.e. no application). You can learn a ton about sex from reading Kinsey’s manuals, but I’d still rather be with someone who has some practical experience.
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Have you ever used a hot or not application? It's easy! You have just to select which is the hottest (or not) between two different choices: TwitOrNot is an application that lets you choose which of your friend's tweets are the most boring, resulting in a real-time dedicated chart of Twitter's users.
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Obtained from this web service: http://twitter.mailana.com/profile.php?person=kOoLiNuS&
{updated to july, 11th 2009}
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