Nice video of an ajax paper prototype. (via)

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Cool. Automatically add filesizes to links (like PDFs) with JQuery and Google Appengine.

Google should let these useful webservices (and others like tinyurl and such) run free on appengine, no limits, sponsored by Google. That would let people build loads of useful little webservices with no worries about monetization, open up a whole new area of innovation.