I actually have proof you signed up for Edmodo in October or November of last year, so you new about Edmodo almost a year ago. The classroom micro-blogging space may be big enough for two but we are more motivated than ever to own the educational micro-blogging space which we are already doing a very good job at it. I'm just letting the Hacker News users the similarities between your service and ours and ours is free unlike yours and we have a business model too :) We put our money where our mouth is and making the Education community a better place by offering the best free micro-blogging we can for individual teachers.