I was able to use the ANA tool to find myself an outbound LAX-->SIN seat in B class in a 77W in December. They are few and far between but some patience and some clicking showed a handful over the next several months. My return flight however is not available in a 77W to SFO or LAX for the whole month.

On the return, have the option of going Thai, Asiana or the old singapore product. I know this forum is biased but what do ya'all think?

My conversation with the helpful UAL agent (i think there is only one) leads me to believe that the SA availability on ANA is the same as his as we went through several days and he was saying the available flights which matched my screen exactly.