Very nice! (Well, I don't know either Firefly or the tune, but the others I do.) And I've snarfed "'Admiral' Miles" into my PDA and will probably sing it at Philcon -- or will you be there?

One nitpick: "renown" has no "k" (no direct connection with "know"), and it rhymes with "clown" as in By, not "clone" as in Mark. OK, that's two nitpicks.

The Filker With No Nickname
aka Dr. Whom, Consulting Linguist, Grammarian, Orthoëpist, and Philological Busybody