I would like to acknowledge the invaluable support and contributions made by the following colleagues, without whom this article would be much less than it is:  Rock An-gier, Carl Ballard, Nancy Boyd-Schimmelman, Ken Briskey, Dave Britton, Jane Conkey, Robert Coyne, Robert Griffith, Robert Gross, Ralph Hodgson, Steve Johnson, Chris King, Mark Langman, Jim Nerney, Steve Marcus, Rich Newbold, Jack Ring, Zach Shoher, Mike Straka, David Taylor, Anne Wheeler, Lynn Wheeler, and Kathy Yglesias.