User blog comment:AYET/About imbued Busoshoku Haki/@comment-4899461-20121103010151

This is a very interesting question. I'm reminded of the old fan theory that Ivankov's "Hell Wink" technique was created by Haki. This was discredited by Oda in an SBS later, of course.

There's definitely some kind of range attacks that are created with Haki though. Look at all of Sentomaru's techniques for example. There's also the combined Haki that the Admirals used to defend from Whitebeard's giant attack. Those kinds of things (along with the blackening Haki) are still quite a mystery to us.