I've been slipping in some plot hooks for Spelljammer where I can with the Goblinoid pantheon, such as hidden temples or mercenary/pirate forces.

You'll also notice a few deities from Spelljammer sources in the list, such as Rais and Klikral. Once I get to the Beholder and Illithid pantheons, there will be plenty of Spelljammer references. I'm also pondering working on the Neogi pantheon, of which only names and portfolios are known. There was, sadly, very little written about the religions of a LOT of the Spelljammer races (to the point that the majority seem to have NO religion), so I'd have to make the vast majority of them out of whole cloth. I've long wanted to do something unique for the Gravs and the Hurwaeti, but I haven't had any good ideas for them yet. There was a discussion on the Piazza a while back about the Dohwar, and making a "Celestial Corporation" pantheon (opposed to the Celestial Bureaucracy, of course) for them that I may get back to one day.
On a side note, I have been considering expanding the goblinoid pantheons with some lesser and demipowers to make them more well rounded, and many of them will certainly have some Spelljammer hooks.
Jeff