We organize at this year's Pervasive computing conference in Nara, Japan a workshop on Pervasive Advertising - http://pervasiveadvertising.org.
We expect that there is a lot of interesting research going on in the area and it is clearly a controversial topic. Being an optimist - I see the new options that arise. In particular a future with less annoying advertisements is one hope :-)
But many people are focusing on the risks that arise - an interesting positing with some criticism of our workshop objective can be found at the near future laboratory I do not share their views :-)
To me the idea that if you do not research it, it does not happen seems not a very viable option. I still think with research we can shape the future!
I am already looking forward to the submission and to the workshop. You have a contribution? Deadline is Feb, 11 2008.