  We study the dynamics of charged, spherically symmetric dust shells in the
presence of a positive cosmological constant. We find generalizations of the
well-known solutions in asymptotically flat spacetime, in particular orbits
into "parallel universes", but also new solutions corresponding to a "bounce"
of the shell before an event horizon has formed. We also discuss "bubble"
solutions, in which a charged shell and an oppositely charged singularity are
spontaneously created and annihilated.
