I have to add forum feature in my wordpress blog.I see bbpress but would like to add forum similar to stackexchange or stackoverflow. Please let me know.
Check out my theme that has the major features of SO/SE like user points, comment voting up and down: http://wpverse.com/civicstack
It's a light/mini version that people can expand on.
I have this plugin if you are interested.
SabaiDiscuss is a premium questions and answers plugin for WordPress. The plugin features the ability for users to ask and answer questions similar to Stack Overflow or Yahoo Answers.