These build-you-own-commercial contests are becoming all the rage. Firefox has gotten into the act with its Firefox Flicks competition that concluded this week with some 280 entries.Here's my one-line review: There's a reason that advertising is a multibillion industry -- not everyone can do it well. Actually, some of the Firefox commercials I looked at aren't all that bad: You might want to check out "Drama Queen" and "Billy's Browser."But the entry voted most popular -- "Wheee!" -- escapes me entirely.