Thank you for your reply. Re the toilet-flushing thing, that is not an urban myth--it really happened during a Super Bowl one time in some city in the Midwest (I think). Water pressure actually dropped or something. Ok, well maybe I shouldn't wait until two or three seconds after the hour then. The time will count as the time the confirmation page comes up, and since it takes so long, I could hit "submit" a few seconds before the hour.
Last year, a few of the prizes did show up after a few months (not sure if it was as early as Oct), but many more were MIA until after I got the winners' list...in March, 2008! We'll see how it goes this year. If you're interested, you can look for the thread from last August to see what happened.