Ask HN: have you installed Reddit/HN features? Best practices?

I want to add a community feature to my site, where people can post links and comments, like Reddit, HN, StackOverflow,... I know the Reddit code is open source (minus the captchas, I think).

I was wondering if anyone can give me some advice about Reddit and Reddit-like alternatives: - ease of installation - the robustness of the system - the maintenance involved - spam control - Wordpress integration

Etcetera. Thank you very much for your help.