  {\narrower\smallskip High Energy onium-onium scattering is calculated as a
function of impact parameter in the one and two pomeron exchange approximation.
Difficulties with using the multiple scattering series to unitarize single
pomeron exchange at high energy are noted. An operator formalsim which sums all
numbers of pomeron exchange is given. A toy model which has a similar operator
structure at high energy as QCD is presented and the S-matrix is evaluated.
Estimates of the energies and impact parameters at which blackness occurs in
onium-onium scattering are given. It is emphased that the problem of unitarity
in high energy onium-onium scattering can be solved in a purely perturbative
context, with a non-running coupling if the onium is heavy enough.\smallskip}
