I was thinking the same thing, but I couldn't think of a good way to implement it. Many times something appears to be solved and then another issue arises. Sometimes someone else has a better solution than the one already posted.
The number of times we give out the same solution indicates that people aren't really looking before posting anyway. Even if I end up in a post that's already been solved, I often take away new information from the post.
I try to update the Solving Problems with Dreamweaver guide with as much new information as possible. This way the self-help types have everything they need in one place, and if we point someone to a solution that doesn't help, they might find one that does without having to go back to the forum.
I keep this page wa/ open in the background to answer questions quickly. When that doesn't solve the problem, at least it gives people a good starting point for further investigation.