Not only is it ethical, it's helpful to ask who will sit on the panel. I would suggest crafting some specific questions to ask the individual members of the committee at the end of the interview.
--Previous Message-- : Thoughts? : : (In other words, if you're interviewing and : you're told there will be 'x' number of : people on a panel for the interview, but : you're not initially told who will be on : said-panel, is it appropriate to ask who : will be on the panel?) :