Beam-beam effects in RHIC and the VLHC

Beam-beam parameters at RHIC are presented.  The "standard model" of
hadron beam-beam collisions with tune modulation in 1-D and 2-D is
briefly reviewed.  Empirical operational data (from electron storage
rings) of beam-beam limits with strong radiation damping are
extrapolated to the very long damping times which may be expected in a
50 TeV Very Large Hadron Collider.  Finally, the potential advantages of
using RHIC for controlled formal beam-beam experiments "in the LHC era"
are briefly discussed.