Great IDE and linux ubuntu shell? YES PLEASE!
This is the future. I wish it was around when I got started programming a few years ago.
Also good for hobby projects where you just want to try out a technology without spending time on setting up the environment
In particular, I really need to know what backend services (if any) are available. Almost everything I write uses at least Postgres and Memcached, are those available? Even just a list of addons/backends would be incredibly helpful.
Straight for the horses mouth:
It seems Nitrous is a mix between Heroku and C9.
It would be very interesting to see some sort of provisioning system built into Nitrous, much like using saltstack/chef/puppet with Vagrant.
Correct me if I'm wrong but if you have full access to the command line you can probably get your recipes working there. If this works, I understand it's not as easy as provisioning with Vagrant but it's a workaround for now.