in the context of the referral of Amaia,
I wonder if you could not use pearltrees collectively, as opposed to my and our personal bookmark collections,
for example, we could do a 'pearltree of the week' and embed it in our blog, agreeing on a common topic,
we could have a rule of at least 3 people volunteering, before launching a pearltree on a particular topic?
see http://www.readwriteweb.com/archives/pearltrees_web_curation_made_sexy_with_embeds.php
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