They didn't offer Nitrous Oxide. And I think - because I drove myself - they wouldn't have given it to me. I did take up the offer to get a prescription for Vicodin - but I haven't really felt like I needed it so far.
I'm quite pleasantly surprised at the general lack of post-procedural pain, swelling, etc. I used a cold pack for a about an hour immediately afterwards, but haven't needed it since. Its more discomfort than actual pain. The worst part seems to be blood in my mouth, and an irritating "tickling" at the back of my jaw where he sutured the wisdom tooth socket. Apparently the sutures will dissolve over the next few days and any remaining will be removed next Wednesday.
Trust me when I say wait for about a month before toughing any alcohol and about 2 ½ weeks for carbonated drinks, plus orange juice. Good Water should be your friend for the first week too.