I’m a TED junkie.  It’s equivalent to potato chips for me.  Can’t just eat one.  Instead I eat the whole bag.  So in my recent TED binge I came across Luis von Ahn’s recent talk about CAPTCHA (which I now no longer find annoying) and his new adventure with DuoLingo [video at bottom of post].  If you didn’t find this talk at the very least interesting…well…I just don’t know what to tell you.