I have developed applications using PHP for some time now but have decided to see what the buzz is about Ruby with Rails.

I was hoping someone could answer my somewhat general questions:

i) is Ruby and Ruby with Rails good on system load ? Can it cope with the same amount of usage as PHP ?

ii) I understand you can use Ruby with Rails with Apache. Does this mean there is no need at all to use the Ruby with Rails server ? If so, which Apache module is required ?

iii) Is the Apache module for Ruby (or Ruby with Rails) good and stable ?

iv) anyone know any large (several million PV/day) websites that use Ruby with Rails ?

v) can Ruby with Rails be used as a complete replacement for PHP in terms of web development ?

Thanks to any who can answer my questions