hookedonrc,
Good question about questions not getting answers. Personally, if I see something with out an answer, and I know something abotu it, I'll usually chime in. (another opertunity to run my mouth, how could I pass it up? )

Seriously, I think the "no responses" fall in to a few groups that I can think of:
- too common of a question - some questions come up over and over and over and over and over and over. I'm sometimes surprised that they usually do get a direct answer. I think a lot of folks would do better to read or use the search a bit, since there is an awful lot of good info on here.
- wrong topic - some questions go unanswered if they really belong in another forum
- too vague - not nearly enough info to give a good answer to it
- too unusual - sometimes you can ask a question, and folks just don't have a good answer for you. I've been known to generalize from areas I know in to areas I'm not so sure on, and I always try to make it clear when I do that, but even so, I've taken a pass on questions that I just don't have a good answer for.
- asked in an annoying way - this one is rare, but it is possible to ask a question in such a way that no one wants to deal with it.
- expecting an answer too quickly - frankly, I don't see many questions go unanswered. Sometimes the question takes a while, since most of us don't "live" on here. It may take a while for the right person with the right knowledge to see a question. I've been known to be away from online forums for as much as a week at a time. I don't think there's anything I can answer that plenty of other folks on here can't easily answer as well, but you get the idea.

The last thing someone should do is assume that if their question isn't answered that it's somehow personal.