deploying a rails app on subdomain with wordpress on root

Hi Im totally new to deploying rails apps and slightly green to administering servers though command line is ok.

I have a rails app (2.3.2) which needs a sales site and blog for which im using wordpress.

Id like

www.example.com

www.example.com/tour

www.example.com/pricing

www.example.com/blog

to be all done via wordpress

and www.app.example.com to be my rails app.

So my questions are

1) Does this wordpress / rails setup demand I use specific software e.g. nginx over apache?

2) How do i setup the subdomain and install the rails app to be linked to it?

Can anyone can provide some pointers, terms to search for, tutorials etc re this???