I concur with Dawn's idea about a permanent program chair.  The learning
curve is huge and the efficient re-use of that talent and skill could be
a facotr in continuity and consistency.  Although all of our programs
have been superior in my opinion and refreshingly different each year.
Perhaps a 2-3 year rotation?
On the other side there is a benefit to allowing one to learn the ropes
and thus rotate as many members as is appropriate for her/his development.
 
Daphne Sipes
Soon to be visiting at Western Carolina University
Currently very hot and dry at The University of Texas at San Antonio