I am more than a little puzzled at the harsh reaction to the finale.
Doesn't anybody appreciate satire, and even some irony? This show was very well written - it poked fun at us Internet "supposers", and more importantly the show itself. It poked fun at all of the hype. It poked fun at clip shows. It even managed to leave possibilities for the future open, although I am under the impression that Jerry was taunting those who thought the surprise twist would be that the show wasn't ending, after all.
While I was not in hysterics as I was for some of the true classics, this show was a fitting finale for a show about nothing. It was THE essence of Seinfeld, and I can't help but wonder if the naysayers got what the show was all about.
See ya in syndication,
Alex