I'm working to launch ASAP my product and need a Forum for support and knowledge-base purposes.
Because of time, money and other constraints cannot implement nor host it on my site (which is Azure based). Therefore I need to externalize it.
What affordable options do I have? can you recommend some providers?
Do you want to externalize the development of the website? also the hosting? also the moderation?
If only the website, you could use something like OSQA.net which will give you a site similar as answers.onstartups.com.
If you need a hosted one, there is coordino.com Long list of alternatives: http://meta.stackoverflow.com/questions/2267/stack-overflow-clones