Brilliant thread!
You mention this in your Greyhawk list, but it is also relevant to Greyspace, so should be included here.
The "2nd Edition miscellaneous" section should also include:
Undermountain: Stardock (because Stardock is an asteroid in the Tears of Selune)
The Illithiad (which includes details on the Astrumundi Chronicles but is seen as required reading by a lot of SJ fans as the illithids are such an iconic race for SJ - it also sets up the three following adventures that have a SJ link)
A Darkness Gathering (first of the Illithid Trillogy)
Masters of the Eternal Night (second of the Illthid Trillogy)
Dawn of the Overmind (third of the Illithid Trilogy)
There are other 2e products that include SJ material. (And for SJ itself, there was a "recommended reading list" as some non-SJ products are kind of required to get the three big spheres to work.)
The "3rd Edition material" section could possibly include
Forgotten Realms Campaign Setting (because of the section about The Sea of Night at the end of the Geography chapter)
Monster Manual V ("Mind Flayers of Thoon" returned from the Far Realm in spelljamming ships - making them a SJ faction - and "Thoon in Eberron" section links the Eberron setting to Spelljammer)
There are some novels ("Miscellaneous novels"?) and short story collections that feature SJ elements:
Realms of Magic (2 stories "Smoke Powder and Mirrors" and "Gunne Runner")
The Dragons at War (1 story "Through the Door at the Top of the Sky")
Elves of Evermeet (has spelljamming ships, spacefaring gold elves and mentions of other worlds)
Finder's Bane (features a spelljamming ship and a spacefaring character)
I've heard that Corsair also features a spelljamming ship and that there are two sequels to Finder's Bane, which might also feature SJ elements (or maybe Planescape elements).