Am pg with my 3rd and have been thinking about this. Contacted a local hypnobirthing 'teacher' recently and am still weighing up my options. My 2 DCs were born reasonably quickly after very straightforward labours, used small amount of G&A. Still hurt like hell though, and even though I look back at both births in a v positive way, I could have done with a bit less pain! Everything that I have read about this seems to indicate that you feel it a bit less. I could have completely got the wrong end of the stick though.
On the other hand I am thinking, just ride out the pain, it doesn't last long (only the last 1 1/2 - 2 hrs were really bad the 2nd time, and that included the pushing), and maybe 3rd time will be slightly quicker anyway. If things go down the route where intervention is needed, then drugs would be involved in that anyway (I think?!).
Has anyone done this? I am also thinking about maybe doing it myself with relaxation CDs etc. I know this prob won't be quite as effective, but that way I can just do what suits me. Does anyone have any info on good birthing relaxation CDs?