Blogs are one of the places on the web you can reliably find people’s writing about their moods. Krisztian Balog presented a paper called “Decomposing Bloggers’ Moods: Towards a Time Series Analysis of Moods in the Blogosphere.” This can be used to produce interesting data. For example, MoodViews tracks a stream of mood-annotated text from LiveJournal. MoodViews tracks, predicts, and analyzes moods on blogs.
This also reminds me of the CSCW work on temporal rhythms, see a list of prior work (here). The references from this class page are:
Wild, Helga, Chris Darrouzet, Ted Kahn and Susan U. Stucky (1995) Rhythms of Collaboration. In Communications of the ACM. Vol. 38, No. 9 p. 45.
Fisher, Danyel, and Paul Dourish (2004) Social and Temporal Structures in Everyday Collaboration. In Proceedings of the 2004 ACM Conference on Human Factors in Computing Systems (CHI04). pp. 551-558.
Begole, James “Bo”, John C. Tang, Randall B. Smith and Nicole Yankelovich (2002) Work Rhythms: Analyzing Visualizations of Awareness Histories of Distributed Groups. In Proceedings of the 2002 ACM Conference on Computer-Supported Cooperative Work (CSCW02). pp. 333-343.
Reddy, Madhu and Paul Dourish (2002) A Finger on the Pulse: Temporal Rhythms and Information Seeking in Medical Work. In Proceedings of the 2002 ACM Conference on Computer-Supported Cooperative Work (CSCW02). pp. 344-353.