I just encountered a 55 points per dollar late night fare LAX-OAK. $56.98 price, $39.70 base fare or 2187 points. Wow.

Similarly 753 points on 13.66 base fare ($29 all-in sale). Also 55 points per dollar.

Please report your findings here.

Caveat: If you buy a late night flight and standby for an earlier flight using A-list status, you can expect your ticket to be re-fared at the normal 72 points per dollar, erasing your time of day savings. That's what I recall seeing the time or two I did that last year. You have to admit this is an eminently fair policy, if it's policy and not just a software glitch.