I too was due yesterday and had my second treatment on saturday. My baby is almost fully engaged (1-2 5ths brim).
Anyway the accupuncturist said that i was not quite there yet on tuesday but on saturday was about to pop. I'm hopeful that todays the day but we'll see. It doesn't hurt and is very relaxing.
I had it with my first as well and went into labour the night of the second treatment so I do think it helps.
GL - hope we are both posting BA soon!