In the interest of self promotion, I wrote a little article about my 605. I also have a Gallery of images containing quite a few pictures of the little beasts :).

LowEndMac has several pages with Q605 info:

Apple have quite a bit of good information in their Knowledge Archive, which has been kept specifically for information regarding pre-1997 (pre second-coming-of-Jobs) Macs.

EveryMac has a couple of pages,

TheAppleMuseum is notable for the timelines of apple products/OS releases.

Macintosh model-specific sites, concentrating on documenting -everything- about just one model mac.

Of course, there's also me. You can see the rest of my site at