I still think Boston would have come back in that Bulls series even if Rondo was healthy (remember, Isaiah was still obviously grieving at that point and wasn't 100% the first few games).
THAT SAID, it would have likely been a close Game 7 series instead of a 6-game series where by Games 5 and 6 the C's just won comfortably and Bulls seemed to give up by Game 5.
But yeah, Playoff Rondo is a beautiful thing to see.