Looks like they're using Sinatra (http://www.sinatrarb.com/ http://www.sinatrarb.com/) if the above erroring pages are anything to go by (http://fry.io/b2 http:

Looks like they're using Sinatra (http://www.sinatrarb.com/ http://www.sinatrarb.com/) if the above erroring pages are anything to go by (http://fry.io/b2 http://fry.io/b2).