hi,
i've been following the contests and have also posted pics and won once... but generally, i'd prefer an informed jury deciding over the pictures entered into the contests. user-votings are biased by friends, by "appealing" motifs, by personal feelings etc. etc. and public voters give exactly no feedback why they vote for a certain photo or not... a dedicated jury would explain their decision and thus help all other photogs...
the "water"-topic, which is in its final minutes now, is a a good example: almost everybody seems to go for long-exposure waterfalls. how many of these waterfalls have we seen over the years? two million, three million? all in extremely high quality, although none of them are included in the contest on this site. OTOH, real "water"-pictures, of which there are some quite good ones in this contest, go nowhere.
another example: my entry in the water-contest is currently on an ex-aequo-standing ranking nr. 2, although i'd never rank it that high. i deliberatly chose a picture i thought would appeal to the average user... and it worked.
wouldn't it be a good idea of having the winner of the last contest decide on a theme for the next contest and also head the the jury (consisting of the winner of the last contest, the public-voting-winner* and Mo)? of course, the jury-members are barred from participating in any of the contests in which they are involved as judges, thus enhancing the chances for other photogs. public voting may be retained* and the winner of the public voting joins the jury for the next contest.
in the "winners' showcase" you'd then have the jury-winner (winner) and the public-voting-winner (runner up); if the two happen to be the same, then nr. 2 of jury gets the "runner-up" status (joining the jury for the next contest).
the jury decides by majority... (although you'd probably discuss and reach a unanimous vote).
hope, not to sound too demanding, in the end this is just a proposal

cheers,
stern
(from good old europe)