As one of the concrete examples Norbert introduced the Hello.Wall done in the context Ambient Agoras . This again brought up the discussion of public vs. private with regard to the patterns that are displays. (photos of some slides from Norbert's talk)
I gave a talk on “Human Interaction in Ubicomp -Magic beyond the screen” highlighting work in user interfaces beyond the screen that we did over the last years. It is motivated by the facts that classical limitations in computer science (e.g. frame rate, processing, storage) are getting less and less important to many application areas and that the human computer interaction becomes in many areas the critical part of the system.
In my talk I suggested using “user illusion” as a design tool for user interfaces beyond the desktop. This involves two steps: 1) describe precisely the user illusion the application will create and the 2) Investigate what parameters have an influence on the quality of the created user illusion for the application. (photos of some slides from Albrecht's talk, Slides in PDF)
Steven Feiner – AR for prototyping UIs
In a further example Steven showed a project that supports field work on identification of plants using capture (of the image of the real leaf), comparison with the data base and matching out of a subset that matches the features. Their prototype was done on a tablet and he showed ideas how to improve this with AR; it is very clear that this may also an interesting application (for the general user) on the mobile phone.
 White, S., Lister, L., and Feiner, S.Visual Hints for Tangible Gestures in Augmented Reality.Proc. ISMAR 2007 IEEE and ACM Int. Symp. on Mixed and Augmented Reality, Nara Japan, November 13-16, 2007. (youtube video)
Finally some random things to remember:
- Richard W. DeVaul did some work on subliminal user interfaces - working towwrds the vision of zero attention UIs 
- Jacqueline Nadel (development psychologist) did studies on emotions between parents and infants using video conferencing
- V2 - Toward a Universal Remote Console Standard http://myurc.org/whitepaper.php
- iCat and Gaze 
 Richard W. DeVaul. The Memory Glasses: Wearable Computing for Just-in-Time Memory Support. PhD Thesis. MIT 2004. http://devaul.net/~rich/DeVaulDissertation.pdf
 Poel, M., Breemen, A.v., Nijholt, A., Heylen, D.K., & Meulemans, M. (2007). Gaze behavior, believability, likability and the iCat. Proceedings Sixth Workshop on Social Intelligence Design: CTIT Workshop Proceedings Series (pp. 109–124). http://www.vf.utwente.nl/~anijholt/artikelen/sid2007-1.pdf