webapp dev with rails
fundedPeople succeed in answering startup's questions 0% of the time (0 success in 3 attempts).
Answers by: pth | Hank | Rich Collins
Well I would suggest you use the acts_as_threaded plugin. At this URL (http://www.railtie.net/articles/2006/02/05/rails-acts_as_threaded-plugin) you will find a short demonstration of using it to create a threaded forum.
Of course expanding the user interface and adding polish is a considerable amount of additional work.
Good luck
pth