iLounge has a great overview of their site’s resources.

Their Free iPod Book and Buyer’s Guide are my favorite because they’re drool-ready and a free download. Remember when this stuff was published in book (and later magazine) and you had to pay for it?

I’ve been using them since I got my first iPod in 2001—they were iPod Lounge before Apple laid down the law(yers)—and they’ve gotten better and better. My only complaint is that I wish their RSS feed had images.