Athol Kay's blog MarriedManSexLife is along these lines. It applies PUA-like insights to long term relationships (this is not the only thing he talks about, but it is a major part). These are more likely to be ethical because in order to work they have to work repeatedly on the same person.
I am very confused why the linked blog could inspire hostility. What little I've read seems correct, of mutual benefit to spouses, and ethically sound.
What am I missing?
Clarisse Thorn recently posted a useful article about Ethical Pick-Up Artistry, bringing up a few basic critiques of traditional PUA and suggesting a few alternatives.
A proposal to formalize thisNot the same thing, but a discussion on forming a community to practice social artistry in general has been brought up on LW before, but I'm not personally aware of anything coming out of that.