I contacted my current webhost and asked whether they support Ruby. As expected, they said a clear ‘no’. So I fired up my browser and found certain Rails web hosting companies so far. Ruby on RailsThe most comprehensive list is at official Rails Wiki and one more with rather useful comments are here.Choose any host but look for FastCGI in the spec list. Otherwise, your app will be loaded to memory on each request and it will mess up the server. So the app and the server - both will be damn slow.

Ambitiouslemon (Now signups suspended), non profit community, is supposed to offer free rails hosting plan. Their features list is very appealing. Take a look and you may get an account today or tomorrow.

Anyway the best way to try Rails is installing the packages in Windows or Linux and test app.