yeah, arnica rocks. i didn't know about it the last two times i gave birth, but have some around for this time. i mainly use it for the kids when they get banged up being kids. DS banged his head so bad a few weeks ago from tripping and falling head-long into an open drawer that he needed 5 stitches - two of them inside, the doc said she could see his *skull* it was so deep - and he didn't have any bruising at all and healed up unbelievably quickly. it was phenomenal.
i'll have to ask my m/w what her protocol is, as i've never used it post partum before. usually i just give it once or twice within a short period after the kids bang themselves up. i know DH took before and after his thyroid surgery, but for the life of me i can't remember how much or how often he took it (it was like 8 years ago).