The rules are simple:
1) The 20,000 visitor must have visited and left a comment at least one time prior to that hit.
2) If the hit occurs at 3:00 AM I am mostly likely not going to catch it. If I can't narrow it down to the specific person, I will throw the names that hit around that time into a hat and pull one winner.
If you happen to visit, and scroll down to the counter and see 20,000 please let me know. Otherwise, I will rely on on my stat counters to identify you.
I'm guess-timating that the hit should come within the next month. Unless of course you are sick and tired of me. Then it will take a bit longer. Happy clicking.