I like commentaries fine and think all DVD's should have at least one. That being said, I still don't listen to them very often. Therefor, they don't warrent a "double dip" for me.
I'm sure the "2 disc" edition will have at least one commentary and even though it won't be the same as the one's on the "single disc" edition, it will be good enough.
I can't afford the constant double dipping at this state (poor college guy that I am) so it's going to have to be a rental for me while I wait to buy the re-release happening down the line.
I like some comentaries (like the Spykids ones) because some people giving the comentary talk about what is going on in the scene you are watching. BUT somtimes I would prefer a good documentry that will say the same things.
Agent cody banks 2 has a "visual" comentary and it is soooooo anoying every couple of minutes the picture freezes and a cast member jumps in front of the picture and says somthing stupid.