Spelljammer: Shadow of the Spider Moon
I think that y'all will be pleasantly surprised by the Spelljammer game presented in the next issue of Polyhedron/Dungeon.
It represents an attempt (by a long-time Spelljammer fan, no less) to capture many of the cool elements of the original setting--magical flying ships, swashbuckling space pirates, alien worlds, and of course the dreaded illithids--while at the same time giving it a feel that's more in tune with the latest incarnation of the D&D game (with a weird "John Carter of Mars"-ish feel layered on top of it all).
Old-school SJ fans should get a kick out of seeing familiar concepts presented in new ways, while those who liked the concept but couldn't wrap their minds around the admittedly "wacky" nature of some SJ tropes can feel reassured that this is as serious a game as they want it to be. (And hey, if you really dig giant space hamsters, nobody's stopping you from putting 'em back in, right!)
Technically speaking, Spelljammer: Shadow of the Spider Moon is both a new D20 "game" and a "D&D" campaign setting rolled in to one. But if either one of those elements doesn't work for you, it should be pretty darn easy to steal the "other half" for your home game.
Is it unique from Dragonstar? Sure it is, if for no other reason than it relies on less wholesale alteration of your campaign world to "port over" elements of the game. (That's not to diminish the creativity of Dragonstar in the least, mind you--everything I've seen indicates that DS has a wealth of original and exciting concepts just waiting for players to try 'em out.)
How do I know all this? Because I'm the big SJ fan who wrote it, based on a concept that Erik and I first started discussing well over a year ago.
So buckle on your swordbelt and hoist the mainsail, 'cause we're goin' Spelljamming!