Yeah I think it would be cool to type in the answer and have it run for 24 hours or so and then the person who runs the contest can type in the number of correct entries here: http://www.random.org/ and randomize a winner :)

That would work.

What if it had an enter box like the riddler?

good idea but some ppl could just copy the majority guesses.

I support. What if it ran for an hour or a day or something and then all the correct answers were "put in a hat" and drawn? That way everybody can have an equal opportunity instead of whoever can load the pages and look through the items the fastest.