API documentation bundle download?

Again from the newbie corner…

There’s probably a really easy answer to this, but where can I get my
hands on the api documentation in an offline bundle that I can
download to use for viewing offline?

For example, I would like to be able to browse
http://api.rubyonrails.com/ offline from my own hard disk.

Thank you.

D'Andrew "Dave" Thompson
http://dathompson.blogspot.com

run gem_server in a prompt and navigate to http://localhost:8808

Mikkel