I haven't posted in Hybridz in a long time. Things change personally and publicly. This forum has changed, its gone through revisions, layout changes, and the like. I don't frequent here much anymore because my obsession for knowledge has slowed with the slowing of my z-car.
I have a couple of suggestions, since most of these problems have been around since the beginning:
Create a wiki for Hybridz. It can serve as our "FSM" (not to hard to setup, can be a great place to send people who are new) Quality content doesn't get drowned out in the noise.
Put time restraints for new members and limit them to certain Topics. (1-week only can post to Non-tech, from there only xyz, etc.) Yeah it may put some people off from coming back, but it will keep a lot of rift raft out.
Improve search functionality. Back before the site overall the search function was decent. But it needs touching up.
Include a "Welcome Pack" on sign up. This could automatically direct them to a wiki, FAQ page, etc.
Heavily promote the Terms of Service of Hybridz. We are on your playground, make sure people know what is expected. Slip in a "What color was the cow?" type question to allow them to progress into the forums.
Just my .02
Keep on trucking...er...z-ing...