We present new evidence for events with a rapidity gap between
jets in pbar-p collisions at sqrt s = 1.8 TeV based on data collected by
triggering the Collider Detector at Fermilab on two high transverse
momentum forward jets and results of a search for diffractive W^+/- and
dijet production where diffraction is tagged by the rapdity gap technique.
We also present the results of a search for diffractive dijets using data
collected by triggering on a very-forward particle in the recently-installed
roman-pot detectors.  The dijet events exhibit additional diffractive
characteristics such as rapidity gaps and boosted center-of-mass system,
however the recoil antiproton measured in the roman-pots is in a regime
in which the non-pomeron contribution is significant.