  Models for soft color interactions have been successful in describing and
predicting diffractive hard scattering processes in ep collisions at DESY HERA
and ppbar at the Fermilab Tevatron. Here we present new comparisons of the
model to recent diffractive dijet data, also showing good agreement. The
topical issue of diffractive Higgs production at the Tevatron and LHC hadron
colliders is further investigated. For H->gamma gamma the irreducible
background of prompt photon pairs from qqbar->gamma gamma and gg->gamma gamma
is always dominating, implying that higher branching ratio decay modes of the
Higgs have to be used. However, such prompt photons can be used to test the
basic prediction for Higgs production since gg->gamma gamma involves a quark
loop diagram similar to gg->H.
