Here's the current tally of posts on ET, based on the publically-available counter...
So how about a contest on the 4,000,000 mark? The winner gets a free dinner at Red Lobster, all-you-can-eat shrimp.
I estimate, on zero analytical grounds, that we will hit 4,000,000 posts on December 18th. Like a celebrity death pool, but with shrimp.
I would like to up that bid to a free dinner at Morton's Steakhouse.