Elf witch and I play it.
Not, in the same place at the same time, mind you...
I picked up the book almost a year after it came out. The players guide first, then i had to hunt down copies of the DM guide.
After that, it took half a year more to get a group of players who were willing to try a Sci-fi game.
And now, my group is hooked. Two other payers have scrounged up the 3.0 Dragonstar Player handbook, and a third bought Traveller d20, which is HIGHLY compatible.
It helps that i'm a halfway decent DM, and help the players whenever possible.
I started them off in the employ of house mezzebonne, over the first four levels, they helped conquer a planet, ultimately taking out a steam-tank in a grand set-piece battle.
Now, they have been issued their own explorer class ship, had some down time while travelling to the next planet on Admiral Bargle's list... they are acting as a scouting vessel...
Nobody has been brave enough yet to play any of the expanded races, but i'm sure once they have a few more levels in them that at least one player in my group is making a half-dragon.