Is Saul's Javelin negated?
Does it matter? Seriously though, I guess it could matter in certain cases (like Abner/Abner's Spear). I would have to rule that it's not, though I'm not certain. There are two sort of similar examples that I can think of, one for each side of the argument. First, weapons don't count for toughness for things like Thaddeus, Widow, etc. Which might mean that NoN doesn't count for toughness of weapons. However, things like experience credit, permanent increase/decrease does count for toughness for things like Widow and Thaddeus, so if NoN is more like that, then I'd say SJ isn't negated. I personally think that the second is the stronger argument, and if I had to rule, I'd go that way, i.e. SJ is NOT negated, because it is a 6/4 enhancement.
