EDIT - Okay no wait it's Finesse or Ranged only which is weird but I guess better kinda... Odd that you could use it on a STR-based throwing attack with a Throwing Axe, but NOT on a melee swing with that Throwing Axe. Poor Jean Tannen.
I found this wierd too. In my games you can Sneak Attack with Light or Finesse weapons. Jean is a good example.
If we go back to the culture of item entitlement we had in 4e, then we will soon see optimization builds involving throwing magical Dwarven Great Axes for Sneak Attack heh.