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From what perspective are you coming to a Mac? Are you a power user in the past on another platform like Windows or Linux, or do you consider yourself a more novice user?
 
Have been heavy PC user (Windows) in the past but nothing complex-Quicken, mail, internet, photos, etc

Thanks, ieani
 
You might like X vs. XP -- it's sort of a shootout between OS X and XP, but more to the point, it really does a great job of walking through the things one does most commonly on a computer and showing how they are done in Windows vs. OS X. So it helped me a lot when I switched.

Mmmm, some other sites that I use a lot....

http://versiontracker.com -- is great for finding any app by name or keyword
http://macosxhints.com -- I don't exactly type this in the address bar a lot, but it's an amazing repository of solutions to common (and not-so-common) problems

There are also a bunch that depend to some extent on what apps you use. For instance, http://pimpmysafari.com is great if you use Safari. :)

Good luck!
 
Not necessarily of the ilk posted above, but I'd recommend you read TUAW and TAB also. They're a nice way to keep on top of the Mac world in general.

You seem to have found MacRumors already, so mark that one off your list :)
 
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