A few weeks ago, we finished a paper that surveys the current state of
parallel computing with R. The paper was lead by Markus Schmidberger and
written while he was visiting the Fred
Hutchinson Cancer Research Center in Seattle. The co-authors are Martin
Morgan, myself, Hao Yu, Luke Tierney and Ulrich Mansmann. The paper is now
available as a technical
report from LMU Munich via open access, and also from my papers page.