Please see my slidespace (gumption) at SlideShare.net - "YouTube for Powerpoint" - for a more comprehensive and up-to-date listing of presentations. The presentations below were composed and delivered in the pre-Slideshare era.

The Practicalities, Perils and Promise of RFID
Dorkbot Seattle meeting on RFID - Identity That Gets Under your Skin
1 March 2006, Center on Contemporary Art (COCA), Seattle, WA.
[Slides: PPT (10MB), PDF (2MB)]
Other presenters included Doug Klunder, Privacy Project Director, ACLU of Washington, and Amal Graafstra, CEO of txtGroups, Inc., and author of RFID Toys.
The Seattle Times printed an excellent article written by Kristi Heim about Amal: "Man grips future with microchip implants in hands".
I created a web page with information and resources about RFID that I compiled during the preparation of this presentation, although it is now out-of-date.

Revelationary Computing, Proactive Displays and the Experience UbiComp Project
Graduate course on Digital Media Global Policy, Law and Ethics
11 January 2006, University of Washington, Department of Communications, Seattle, WA.
[Slides: PPT (3MB), PDF (2MB); Abstract: HTML]

The Practicalities, Perils and Promise of RFID
Northwest Entrepreneur Network (NWEN) Seminar on Emerging Trends in Wireless Technologies
26 April 2005, Bellevue Community College, Bellevue, WA.
[Slides: PPT (7MB), PDF (1MB)]
[The slides from the combined presentation by the moderator, Tom Ryan, and my co-panelists, Jim Grams and Mark Philips, can be found here.]
[A report on the panel can be found here.]
[As noted above, I've created a web page with information and resources about RFID.]

Proactive Displays & The Experience UbiComp Project
Keynote, UCSD Jacobs School of Engineering 23rd Annual Research Review
28 February 2004, University of California, San Diego
[Slides: PPT (2MB), PDF (1MB)]

Technology in Places
Keynote, Intel Meaning of Place Forum
9 September 2003, Hillsboro, OR
[Slides: PPT (8MB), PDF (1MB)]

A Whirlwind Tour of Computer-Supported Cooperative Work
Tutorial, 2002 ACM Conference on Computer Supported Cooperative Work (CSCW 2002)
(co-presented with conference co-chair, Elizabeth Churchill)
17 November 2002, New Orleans
CSE 510: Advanced Topics in Human-Computer Interaction (graduate course),
5 March 2003, University of Washington, Department of Computer Science and Engineering
CS 160: User Interface Design, Prototyping and Evaluation (undergraduate course),
24 November 2003, University of California, Berkeley, Department of Computer Science
[Slides: PPT (2.4MB), PDF (2MB); Abstract: HTML]