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But then you have to email your friends to let them know you put a new link out there, so...

Edit: Am I wrong?

I believe the point was that those on Delicious shared links through Delicious, not via email.

Meaning, yes you in the past had to share links via email. Delicious solved that with both parties on Delicious.

Yeah I understood that. But unless your friends are constantly checking for new links shared on Delicious, you would have to notify them that you've posted a new link. SMS, phone call, AIM, email, somehow.

People actually checked Delicious like they checked Twitter or Facebook.

Or they subscribed in a RSS reader.

You could subscribe via RSS. I had a bunch of delicious feeds that basically just fed me new sh*t on exactly the topic I was interested in. Because they had been tagged by humans I trusted. It was great ;-)

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