Ruby on Rails will ship with OS X 10.5 (Leopard)
Just read this on Riding Rails
It's finally official: Ruby on Rails will ship with the next version of OS X (see "Internet and Web"). Both server and client (on the developer DVD). We've been working with Apple for quite a while to make this happen and its great to finally be able to share it with the world.
This is just incredible. I'm speechless.