Bill Warters has a great post on his blog highlighting a collection of info on high tech tools that can be used in online dialogues put together by the National Coalition for Dialogue and Deliberation.
As Bill notes, the topics covered include:
"Introduction to Collaborative Technology
Key Terms for High-Tech Collaboration
Technology for Online (and sometimes face-to-face) Collaboration
Discussion Mapping Tools & Resources
Polling and Survey Tools
High-Tech and Online Dialogue & Deliberation Programs
High-Tech and Online Experiments in Public Participation
Resources on Building Online Communities"