The guy who runs infosthetics recently went to a conference on pervasive computing (those crazy people with budgets, huh). He sat in on a talk by Adam Greenfield about the ethics of ubiquitous computing. The talk was about the ethics of ubiquitous computing, aka 'everyware' (software that is ubiquitous). The 5 points Adam lays out are:

(1) all ubiquitous systems should default to harmlessness.
(2) ubiquitous systems should be self-disclosing (e.g. be clearly perceptible, "seamlessness" must be an optional mode of operation). proposal of 5 different graphical icons to disclose capabilities of an object (see first image above the post).