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.