Forums and other online sites where people sharing similar interests usually take an informal sense towards used literature. I'm almost completely in to informal style of writing. For this project, since the forum topic is vague, I should make-do with one day of studying the needs, likes and dislikes of the users in the forum, and the two days to maraud it with useful, albeit informative posts.
When it comes to forums, I guess my best bet on themes will be tutorials. My second best will be reviews. Third would be replying to threads.
I look forward to working with you!