  A brief review of the modern QCD theory of diffractive DIS is given. The
recent progress has been remarkably rapid, all the principal predictions from
the color dipole approach to diffraction - the $(Q^2+m_V^2)$ scaling, the
pattern of SCHNC, shrinkage of the diffraction cone in hard diffractive DIS,
the strong impact of longitudinal gluons in inclusive $J/\Psi$ production at
Tevatron -, have been confirmed experimentally.
