You might enjoy a newsletter called The Convivial Society, which is heavily influenced by Illich.
I'm just starting Tools For Conviviality. I suspect that Illich's ideas are underrated because, at least today, most people want more and Illich does not offer that. He offers freedom, I think, in his definition of conviviality... but it seems to be quite clear that offered freedom or comfort, most of us today (I'm not excluding myself from this) prefer comfort.