Finally! DVD!

[UltimateTrekker]

"Classic moments... will no doubt feature in the commentaries [Nimoy and Shatner] are providing for special edition DVDs of the Trek films. "We're doing those now I believe," said Nimoy, who has yet to complete his commentary tracks.

"Haven't you finished recording your commentaries? Why are you waiting so long?" Shatner asked his co-star. In reply, Nimoy quipped "I always come along behind you. You've always got to be the first one through the door!"

[Christina]

That rings so true.
From a couple of good friends who aren't afraid to swap banter in public.