  We present model-independent estimates of the signal-to-background ratio for
Higgs --> b anti-b detection in double-diffractive events at the Tevatron and
the LHC. For the missing-mass approach to be able to identify the Higgs boson,
it will be necessary to tag the b quark jets in the central region. The signal
is predicted to be very small at the Tevatron, but observable at the LHC. We
note that the double-diffractive dijet production, may serve as a unique gluon
factory. This process can be used also as a Pomeron-Pomeron luminosity monitor.
