WikiArduinopedia, rolls right off the old tongue don't it?
Now, here's a guy who's made repeated posts about 12,000 times.
But only posted about the word WikiArduinopedia twice now.

Seriously I think the majority of raw inexperianced beginners coming here asking something about their brand new arduino board and problems they are having will always prefer the more personal touch of a 'tailored' response. Heck many don't even know what to actually ask other then what could cause the symptom they are seeing. Telling them to RTFM or check out the stickies, or it's in the arduino playground somewhere is probably not their first choice of help they are looking for.
The usefulness of a good troubleshooting, or getting started, or tips and hints wiki could be a very effective tool for the arduino community to have at their disposal. But based on what I've seen of the quality and usefulness of the Arduino playground, I still think it would be a hard project to develop and maintain long term to any decent level of quality. So much changes quickly in the Arduino hardware and software world that archived data ages rather poorly. But that's not to discourage anyone taking a lead in trying to do it.
As far as the personal burden for posters responding to repeated posting to new people for old known problems or solutions, I think if it was actually a burden then they wouldn't be doing it would they? No one is paid here to post or even moderate the forum and we all use the site as we wish. So I'm not quite sure what problem you are actually trying to solve? I reserve the right to determine what is or is not a personal burden to myself.

Lefty