Getting started on mobile platforms?

I am an experienced developer who has worked for years on web applications, but I'd like to bone up on iPhone, Android, and BlackBerry development. Essentially I want to build an expertise in mobile development, with deep knowledge of at least one of the major platforms, and a good grasp of the others.

What I want to know is,

1) What equipment should I grad to get started ? For example, I'll obviously need a Mac to work with the iPhone.

2) What are the really good resources for the given platforms (both sites and books are fine)?