PUBLISHER James Maurer jmaurer@acmqueue.com
EDI TORIAL S TAFF Managing Editor John Stanik jstanik@acmqueue.com
Copy Editor Susan Holly
Art Director Sharon Reuter
Production Manager Lynn D’Addesio-Kraus
Editorial Assistant Michelle Vangen
Copyright Deborah Cotton
EDITORIAL ADVISOR Y BOARD Eric Allman Charles Beeler Steve Bourne David J. Brown Bryan Cantrill Terry Coatta Mark Compton Stuart Feldman Ben Fried Pat Hanrahan Marshall Kirk McKusick George Neville-Neil
SALES INQUIRIES Jonathan Just 212-626-0654 jonathan.just@acm.org
CONTACT POINTS Queue editorial queue-ed@acm.org
Queue advertising queue-ads@acm.org
Copyright permissions permissions@acm.org
Queue subscriptions orders@acm.org
Change of address acmcoa@acm.org
ACM Queue (ISSN 1542-7730) is published ten times per year by the ACM, 2 Penn Plaza, Suite 701, New York, N Y 10121-0701. POS TMAS TER: Please send address changes to ACM Queue, 2 Penn Plaza, Suite 701, New York, N Y 10121-0701 USA Printed in the U. S. A.
The opinions expressed by ACM Queue authors are their own, and are not necessarily those of ACM or ACM Queue. Subscription information available online at www.acmqueue.com.
ACM HEADQUARTERS
Executive Director and CEO: John White
Deputy Executive Director and COO: Patricia Ryan Director, Office of Information Systems: Wayne Graves Director, Office of Financial Services: Russell Harris Director, Office of Membership: Lillian Israel
Director, Office of Publications: Mark Mandelbaum Deputy Director, Electronic Publishing: Bernard Rous Deputy Director, Magazine Development: Diane Crawford Publisher, ACM Books and Journals: Jono Hardjowirogo
Director, Office of SIG Services: Donna Cappo
EXECUTIVE COMMIT TEE President: Wendy Hall Vice President: Alain Chesnais Secretary/ Treasurer: Barbara Ryder Past President: Stuart Feldman Chair, SIG Governing Board: Alexander Wolf
For information from Headquarters: (212) 869-7440
ACM U. S. Public Policy Office: Cameron Wilson, Director 1100 17th Street, N W, Suite 507, Washington, DC 20036 USA office: +1-202-659-9711, fax: +1-202-667-1066, wilson_c@acm.org
ACM Copyright Notice: Copyright © 2008 by Association for Computing Machinery, Inc. (ACM). Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and full citation on the first page. Copyright for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy other wise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or fee. Request permission to republish from: Publications Dept. ACM, Inc. Fax + 1 (212) 869-0481 or e-mail < permissions@acm.org>
For other copying of articles that carry a code at the bottom of the first or last page or screen display, copying is permitted provided that the per-copy fee indicated in the code is paid through the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, phone 508-750-8500, fax 508-750-4470.
References:
Archives