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PUBLICATIONS OFFICE: ACM, 2 Penn Plaza, Suite 701 New York, New York 10121-0701, USA +1-212-869-7440 FAX: +1-212-869-0481 Editors-in-Chief Jonathan Arnowitz & Elizabeth Dykstra-Erickson Executive Editor Ken Korman Managing Editor Judy Grover Art Director Andrij Borys Associate Art Director Alicia Kubista Production Manager Lynn D’Addesio Kraus Copy Editor Kate Crane Contributing Editors Books: Gerard Torenvliet Bridge the Gap: Carolyn Gale Connections: Manfred Tscheligi Fast Forward: Aaron Marcus Here’s Entertainment: Dennis Wixon On the Edge: Lars Erik Holmquist Pushing the Envelope: Fred Sampson The Way I See It: Don Norman The Well-Tempered Practitioner: Chauncey Wilson Timelines: Jonathan Grudin Under Development: Gary Marsden Founding Editors John Rheinfrank & Bill Hefley interactions (ISSN 1072-5220) is published six times a year in January, March, May, July, September, and November, by the Association for Computing Machinery, Inc., 2 Penn Plaza, Suite 701, New York, NY 10121-0701. Periodicals postage paid at New York, NY 10001 and at additional mailing offices. POSTMASTER: Please send address changes to interactions, ACM, 2 Penn Plaza, Suite 701, New York, NY 10121-0701. http://www.acm.org/interactions Editorial Information: To contact interactions, e-mail our editors at eic@interactions.acm.org or mailbag@interactions.acm.org submissions@interactions.acm.org The EiCs generally respond to inquiries, including responses to unsolicited manuscripts, in 3-4 weeks. Submission information All manuscripts should be submitted to interactions, ACM, 2 Penn Plaza, Suite 701, New York, NY 10121-0701 or submissions@interactions.acm.org. Advertising ACM Advertising Department 2 Penn Plaza, Suite 701, New York, NY 10121-0701 (212) 869-7440 FAX: (212) 869-0481 Account Executive William R. Kooney acm-advertising@acm.org m c a