  The study of the ground state of spinless fermions in 2d disordered clusters
(Phys. Rev. Lett. {\bf 83}, 1826 (1999)) has suggested the existence of a new
quantum phase for intermediate Coulomb energy to kinetic energy ratios $r_s$.
Exact diagonalization of the same small clusters show that its low energy
excitations (quantum ergodicity above a few ``hexatic'' excitations
characterized by oriented currents) significantly differ from those occuring in
the Fermi glass (weak $r_s$) and in the pinned Wigner crystal (large $r_s$).
The ``hexatic'' excitations vanish for temperatures of order of the Fermi
temperature.
