To be honest, I think that Forgotten Realms is the only setting that really fits spelljamming.Oerth and Greyspace
My personal theory is that nobody wants to let kender escape from Krynn.Krynn and Krynnspace
I wonder what happens when a priest of Takhisis runs into a priest of Tiamat?Draconians get a special note: There's a mention that about a dozen Draconian-crewed ships exist, with three times more with Draconian crewmen. They're noted as remaining evil, but "their dedication to Takhisis dwindles once they leave Krynnspace." They're better than Neogi, but more savage than Spelljammer's lizard men.
Realmspace is great. Oriental Adventures is 1e, but was never updated to 2e. Instead, OA races were described in the Kara-Tur MCA. Since OA is basically an independent book anyway and almost a PB of its own, you didn't really need to update it.For references, we're pointed to Kara-Tur (Boxed set), Oriental Adventures (This is the 1st edition book, right?), The Horde (home of the Tuigan pseudo-Mongols), Arabian Adventures (Book for Al-Qadim), Land of Fate (Box set for Al-Qadim), and of course Realmspace.