As Matthew Weir O'Phinney points out, David Hansson (of Rails fame) has posted a few comments on what he calls the "immediacy of PHP".

I love the fact that it's all just self-contained. That the language includes so many helpful functions in the box. [...] PHP scales down like no other package for the web and it deserves more credit for tackling that scope.

and to that, Matthew comments:

It's nice to see leaders of projects like Rails having this same attitude. It's a breath of fresh air in the competitive market of web development frameworks.

Mike Naberezny has posted a few more articles to the "Rails for PHP Developers" website (based on this book) covering some more of the basics.

There's three new tutorials posted:

• Ruby Block Scope - the basics of Ruby block scope, a common point of confusion for PHP developers new to Ruby.
• Variable Arguments - an article that shows two common API patterns found in Rails, variable arguments and option hashes, and how to implement them both in PHP.
• Regular Expressions in Ruby - a useful reference that maps all of the common PHP regular expression functions to the equivalents in Ruby.

Check out the rest of the site for even more great content.