Great idea and nice execution, congrats! My 2c: I'd suggest you to focus at one niche and make it really great! Just as facebook started in one University and

Great idea and nice execution, congrats! My 2c: I'd suggest you to focus at one niche and make it really great! Just as facebook started in one University and then expanded over others.. For instance now you have 4 Rails developers in your list. Why not make it place to go if you need Rails developers? Or Python? This way you can laser-focus all your marketing efforts. Good luck with that!