I've read several differing opinions here. 1) Some people(Spencer Haws, etc.)think that linking to authority sites gives some kind of backwards ranking authority(you link to wiki). You pass link juice to that target site, and you gain authority. 2) Some people think that linking to an authority site gives no SEO benefit, you simply lose your link juice(many people on these forums). I personally have seen no benefit. Anybody have some experience here?