[houltmac]

What you are looking at coding really isn't computer programming as such, it's programming for the web. You don't need to learn any machine specific languages but rather cross-platform web-based languages and techniques. Since the code would be stored elsewhere and interpreted by a browser (any browser, on any platform [viz. OS X, Windows, Linux etc.]) you aren't programming for the operating system/platform and as such don't need to worry about that kinda thing.

Starting with blogs and so forth doesn't require any "programming" knowledge at all, it's all user installable and manageable now. You can even customise with templates and then look through the fairly human readable code to change it without having to know it. As I said, none of this is effected by you or your users using a Mac or a PC, simply by the browser they use (viz. Safari, Firefox, Opera, IE etc.)

I don't have any particular resources in mind, but I thought it was worth making that distinction.