Tutorial for installation on shared webhost?+discussion
There's not a tutorial per se, but the process is very much like setting up a rails site. In fact, you shouldn't ever have to give a thought to ruby on rails as you work through the process, because the rails installation is handled as part of the wagn gem install.
The basic installation is usually pretty quick on linux, but if you run into issues there, please let us know where.
Running wagn in production takes a few extra steps, but we're really working to simplify that in coming releases!
I've heavily modified wagn in production and will include detailed instructions on how to setup everything. In the meantime you can check this out: http://karolgalanciak.com/blog/2013/07/19/centos-6-4-server-setup-with-ruby-on-rails-nginx-and-postgresql/
It's very well written and I highly recommend that setup.