Drow are wusses anyhow.
But seriously, most weapon types don't even have these feats in game. Hell, even a lot of the REGULAR weapon specializations aren't in game.
Would I like to see them? Since that's what fighters get in lieu of spells (and on FK, in lieu of really strong magical arms and armor too..), I feel that they all should be available in all fighters guilds. However, as with all things, if you want it bad enough I suggest you build it yourself.

This land shall come to the God who knows the answer to War. -Ninety-Nine Nights