  Kerrr in the title is not a typo. The third "r" stands for "regular", in the
sense of pathology-free, rotating black hole. We exhibit a long search-for,
exact, Kerr-like, solution of the Einstein equations with novel features: i) no
curvature ring singularity; ii) no "anti-gravity" universe with causality
violating timelike closed world-lines; iii) no "super-luminal" matter disk. The
ring singularity is replaced by a classical, circular, rotating string with
Planck tension representing the inner engine driving the rotation of all the
surrounding matter. The resulting geometry is regular and smoothly interpolates
among inner Minkowski space, borderline deSitter and outer Kerr universe. The
key ingredient to cure all unphysical features of the ordinary Kerr black hole
is the choice of a "noncommutative geometry inspired" matter source as the
input for the Einstein equations, in analogy with spherically symmetric black
holes described in earlier works.
