Hugo Christiaans, one of my students, has done an excellent project, namely Share Your Context, about contextual information exchange.
[PDF, 2M] Share your context
Summary of the report:
Non face‐to‐face communication of social and emotional experiences between people happens nowadays through phone or other media like email, IM (Instant Message), webcam and other virtual communities such as Second Life. Share experiences, express creativity and maintain easily contacts have made these virtual worlds very popular for millions of Internet users. To support the communication in these worlds emoticons are often used. This form of context is a combination of different states (physical, information, social and emotional), which help the receivers too understand the received information right.