I'm developing a website with JRuby on Rails because I need some Java functionality server-side. I figure to deploy it, I will need to use a hosting service that supports JSP. Am I right and is that all I need? Or is there something else I will need to deploy my site? How would I go about doing this?
You should be fine with any host that supports java servlets. Then you simply run warbler on your jruby on rails project and deploy the war-file. I am currently doing this with stax (http://www.stax.net) and it works fine.