Is Heartbleed still a security concern or has it been neutralized?

Time flies, but it was only about 10 weeks ago that news of the Heartbleed security bug broke and created a few days of mostly justified panic. I haven’t heard anything about it in a while now. Has the problem been completely resolved, or is Heartbleed still cause for concern?

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Story added 29. June 2014, content source with full text you can find at link above.