Has anybody here using Meteor for something serious? I am aware that tmeasday is writing a book about it here http://themeteorbook.com/ and it was discussed on HN http://news.ycombinator.com/item?id=5179828, but would like to know if Meteor is being used for something real at the moment.

There is also Derby, which I am also looking into.

I am starting a new real-time project, and I need to decide what framework to use :)

I don't know if I'd call it serious since it's a demonstration project and not a business, but have you seen http://telesc.pe ?

here at http://torsh.co we are just about to release the next version of our serious/real-world 'video based professional development platform for teachers' built with meteor(ite) - paying customers and all

Can you guys tell us more about your hosting backend when someone runs `meteor deploy`? Is that code open source?

I'm also very confused about going with meteor or derby (or angular maybe plus py/flask backend)? any advice?