Whip Question

[Saldiven]

Ultimate Equipment says:

"A whip deals no damage to any creature with an armor bonus of +1 or higher or a natural armor bonus of +3 or higher. The whip is treated as a melee weapon with a 15-foot reach, though you don't threaten the area into which you can make an attack. In addition, unlike most other weapons with reach, you can use it against foes anywhere within your reach (including adjacent foes)."

Is there a feat or ability that allows a whip to threaten the area into which attacks can be made?

[TGMaxMaxer]

Ultimate Combat has the Whip Mastery chain of feats that do this.

Also, Scorpion Whips can skip the armor blocking damage thing.