I had an epidural, but it was shut off towards the end, so it had worn off a fair bit by the time I gave birth. I still felt like my legs were heavy and not working right, but could walk, holding my husband's arm, about 15 minutes after the birth... maybe sooner, but that's when they had *finished* with me.
They took the baby off to the ICU a few minutes after birth (inhalation of fluid) so, just had a couple of stitches, then they suggested I go take a shower. Not too long after that i could walk around fine.
Our son was born in the early hours of the morning, then I was basically on my feet walking here and there pretty well non-stop ... back and forth between our room and ICU, being moved to another room, greeting visitors and showing them the baby etc... until bed time that night, after having been awake and labouring for the last couple of days. I seemed to have heaps of energy, not really tired or sore at all... well, a little, but nothing that stopped me being up and about.