Sometimes do you like to get your info straight from the source? You know, skip the middleman? Well, actually, Apple makes that possible, at least for official Apple-related news (that's really all that matters anyways, right?).
I happened to stumble upon the Apple Press Info site, which contains links to all of the official press releases from Apple, as well as several other little goodies. Some of these goodies include things like (very) high-resolution images of all products, a list of upcoming Apple events, and bios/pictures of Apple's important people.
Yeah, most journalists know about the Apple PR site being that it contains links to their press releases and images like you said, and also beacuse it lists all of Apple's PR contacts.