Wow, that's really handy for people who document this kind of stuff. NEC seemed so much better about preserving this kind of info than most other hardware companies. Like with some of the PC-FX demos I have, I was surprised to discover that they contain huge databases of basic info on PC Engine and PC-FX releases, including release dates. With a lot of older games on other systems, you're lucky if you can pinpoint the month for certain, let alone the exact day.