Warm absorbers appear to be a somewhat robust property of AGN with luminosities which are a significant fraction of the Eddington luminosity. Line widths are crudely consistent with virial motion at a distance comparable to the likely location of the obscuring torus. A torus origin for warm absorbers raises questions: 1) Can the ‘simplest’ driving mechanism, i.e. thermal evaporation, explain warm absorber observed properties? 2) Can warm absorbers help us to understand the nature of the torus itself, i.e. its dynamical support? 3) What might be the key observational and theoretical approaches to helping answer these questions?. In this talk I will briefly discuss dynamical simulations aimed at testing simple scenarios for warm absorber flows. I will show that there are promising results from such simulations, but also fundamental problems with observational comparisons. Some possible future avenues will be discussed.
// by Adi