I've posted my opinion a million times - the chronological version is nice as a novelty, but it cannot compare to the standard releases. Coppola did it cuz a network made him an offer he couldn't refuse. What complicates this issue, though, is that the chrono versions have the extra footage added. That makes it much more worthwhile to watch them.
As for Memento, I watched the DVD last night and I didn't see any option to play it "backwards" (forwards)... is there another version of the DVD coming out or something? Memento must be pretty bad played backwards...
JG