Recently I stuck my foot in it when I observed that I know 8 out of the 10 most popular programming languages. Dude, most everybody here can say that! was the response.
So is that true? How many technologies do you know? And to count, you need to have developed more than two systems that went into production and has real, live users.
If you know more than 2 or 3 of these technologies, speak out! You can help make me look like an idiot. (Not that I need help, most days!)
If you really want to impress Hacker News readers, learn the ten least popular languages :P.