A dedicated group of "volunteer citizen-journalists" are in the midst of polishing a grassroots election monitoring system, called Twitter Vote Report [twittervotereport.com]. It features an innovative use of Twitter as the main infrastructure for distributed data collection, for example by messaging "#machine" for machine problems" or "#wait:[minutes]" for long lines. The Twitter system will allow voters to easily report illegal voter suppression, and will also aggregate wait times, hereby synthesizing many little snowflakes of data into a whole greater than the sum of its parts.
The group already has a few data visualizations of their data streams live, although it seems more advanced visualizations are still under development. There may still be time to help whip up some more informative visualizations of this data, or to mash up the data feeds that the project will be making available in your own visualizations. If interested, visit planning wiki for more details and see their press page for more coverage.
A live report is embedded below.