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Well, memories like that don't last long in the online world. Twitter let the domain name summize.com expire some time ago, and now it's just a long list of advertisements. After the acquisition, Summize used to redirect to search.twitter.com, and some users are still used to typing summize.com into their browsers, but obviously not many, as the change has gone largely unnoticed.
As far as domain names go, summize.com is solid and definitely has some value; we're guessing it's just a matter of time before someone purchases the name and builds something around it.
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