Wikipedia on Strange Loops

It's good to see Wikipedia giving prominence to Strange Loops.

Here's an extract :

A strange loop arises when, by moving up or down through a hierarchical system, one finds oneself back where one started. Strange loops may involve self-reference and paradox. The concept of a strange loop was proposed and extensively discussed by Douglas Hofstadter in Gödel, Escher, Bach, and will presumably be further elaborated in the same author's new book I Am a Strange Loop, which is due to appear in 2007.