Group Observation -- Nice observation considering the ephemeral nature of eating and trying to make it more persistent and how this can be an enjoyable process. Good use of the word 'imbue'.

System -- We have some concerns that you may not be able to find the food technology needed to tag the food. But on the other hand, it is probably a non-issue since we are more interested in how you envision the interaction between the user and food. (I.e. don't get too caught up on the 'how' of the implementation.)

Use-Case Scenarios -- Nice job considering your use case scenarios. it's good that you have broken the "let's record nutritional intake" mold and began thinking about how food can interact more with the environment.

Related Work -- There's been work by Ted Selker concerning a spoon that measure saltiness, temperature, etc. ( http://context.media.mit.edu/press/index.php/projects/foodlab/) There was a project at Ubicomp recently that could detect what you ate by putting a mic in your mouth to measure your chewing sounds (Amft, O. et al. Analysis of Chewing Sounds for Dietary Monitoring. Proceedings of Ubicomp 05). Kenghao (in the BiD lab) had a table which could also determine what and how much of that you ate. You may want to consider what people have been doing with food blogs and how they share their experiences with others. Dole has recently released technology which lets you track where your bananas came from (http://www.doleorganic.com/ ), and there's an intergenerational cookbook called the Living Cookbook (Terrenghi, L., Hilliges, O., Butz, A.: Kitchen Stories: Sharing Recipes with the Living Cookbook. Published in a special issue of Personal and Ubiquitous Computing, Springer Journal.). You may want to check these out :)