Since most folks (newer members especially) don't go back to the very early posts to see what's there before asking a question, why not delete those posts that are a year or two old, after sorting through them and saving threads that contain very useful tips and tweaks (like those offered up by Nickn and such) and make stickys out of them?
This would do two things.
1) It would make it easier to find USEFUL answers to many questions simmers have.
And
2) It would help save space on the server, while at the same time, reduce clutter.
It seems that the majority of questions being asked have been answered before, but due to the limit on results you can get from a forum search (15, I think) it forces many to ask again.
Just an idea.