So far: nothing.
Tried the pump (stimulation causes the release of oxytocin, which causes contractions) for aoong time today, and now I'm on an interval schedule. I have been feeling some mild contractions, but nothing serious.
Still waiting. We may be waiting for a long time, and that's ok. If I see the midwives again next week we'll do another membrane sweep, but I'm not going to worry one way or another. We just have to wait. Like everyone else who's ever had a baby, there's some waiting involved.