I'm one nerd, and I know a solid two hundred plus people in real life that asked me what the Instagram thing was all about because they had heard about some stuff and needed clarification. I won't run through what I talked to them about but I can assure you, it is not just nerds and geeks that care about this stuff. The key difference why I got 200+ people IRL asking me questions about Instagram? Because I am patient and can explain things in layman's terms. Non-technical people won't ever ask someone that assumes they don't want to know these things questions regarding these things.