HINT: It is easier if you create a Word/Pages document, updated through the week with each new entry. Copy/Paste, review for final edit and identify winner. Takes about 5 minutes after contest closes, and not overwhelmed if doing one to three summaries per day.Indeed.
One thing that last week's judging exercise did teach me was how much actual time it takes to adjudicate the weekly competition fairly, give decent (and comprehensive and constructive) feedback, and give thought to how you plan to write the whole thing up.