Your advice (especially #3 below) is an excellent addition to the initial suggestions. While an interviewee should have researched a company, the market and it's competitors, there are some things that one usually can't find 'from the outside'.
A valuable potential employee is always seeking to learn more about his/her company and all that pertains to it. An inquisitive interviewee shows this desire to gain knowledge by asking about the company and the position in the interview.
Excellent post!
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"3. The candidate merely responds to questions and asks none of his/her own. You don't want to know anything about me, my department, your potential colleagues, your possible customers, how we do things, what the daily workload would be like? The door works the same way on the way out as it did on the way in, only backwards."
