One possibility might be to have a limited series of Tags that each question could be linked to. For example "stepper motor", "serial comms". Stackoverflow uses a system like that.
Yes, I like how Stackoverflow is so easy to use. The tag base approach, related links on the right hand side. Answers can be voted upon, making it easier for a newcomer to find a best approach method.
You are right, I've not come across another forum as busy as this one, refresh the main forum page, blink,refresh again and it's all new posts. A lot of the time many new posts are re-hashed old posts as a lot of people do not re-search by looking to see if their question might have been answered beforehand in another thread.
At least we are a busy bunch and you don't need to wait for days for advice if you present your question clearly and with any code in code tags. Nick Gammon has been trying to address a lot of the issues with providing a more detailed 'How to use this forum' topic.
I guess we are also stuck with this version of SFM forum software for the time being.
Hopefully when the next upgrade is performed it will relieve some of these issues.
Imagine, a forum for the Arduino community that was base on the Stackoverflow model, yum.