I'm looking for good resources that can easily explain how to take my website and make a mobile version of it. There won't be as much info on the mobile version as on the main site, but that's intentional. Is it done using alternative CSS (like you would for print) or some other framework?
You should check out jQTouch. It's an open source project built on top of jQuery that makes it easy to create sites for iPhone and Android mobile browsers. Here's the link: http://jqtouch.com/
I can recommend this book:
and this article: