Awesome! Greatest ever? I don't know about that, but it's certainly one of the funniest. When it originally aired, I tried watching an episode here an there and never got it. Then, later, after it had gone off the air, a friend of mine brought the DVDs over and we watched them in sequence, and that's when I got it. There are so many running jokes that you don't get unless you watch them in sequence. Very clever.
I'm glad to see it's coming back.
Firefly may have my vote for best show ever.