I am a member of the program committee of
the 2007 workshop in
Internet and Network Economics; following the paper submission deadline on the 13th, I have received a list of 15 papers to review. This followed a "bidding phase" - it looks like most of the papers I was given are ones that I said I preferred, evidence that our commmunity can put theory into practice, perhaps?
While it is a fair amount of work to review these papers, even when using some sub-reviewers, one does at least get credit for being on the program committee, in sharp contrast to (anonymously) reviewing journal submissions, or sub-reviewing conference submissions. For this reason, there is never any shortage of takers for this particular kind of task.