I'm pretty sure that's what I had repaired, or at least something in that same area. (Between this and the spine surgery thread, people are going to think I'm a mess

)
Anyway, I actually had two surgeries, the first was arthroscopy b/c they didn't know what exactly was wrong.
The second was through about a 3 inch incision. They shortened my ulna, inserted 3 pins and used bone shavings to fuse the area together.
I was awake the whole time, and had a nerve block. They inject a local anesthetic in your arm, sort of near your armpit. Then your whole arm goes to sleep. I was also given a little bit of a relaxing agent. They said if I started to freak out during thr procedure, they would give me more relaxing meds (Versed or something like that, the called it vitamen V).
The surgery itself was maybe 1.5 hours. The only kind of icky part was feeling the vibration from the bone saw where they shortened the ulna. That part wasn't so cool

But the doctor was helpful and the nurses kept talking to me.
It was done out-paitent, so I think I was in the recovery room for a few hours before I was able to leave. Obviously someone else drove me home. I was perscribed strong pain meds (vicodin) but my stomach does not tollerate them at all, so I stuck with tylenol. The weirdest part was feeling my arm regain feeling. I was sitting on the couch and all of the sudden, my pinky moved. It was so strange!
I took it pretty easy for the first few days, but I was fine. I was just super careful about picking stuff up, driving etc.
Good luck! Let me know if you have other questions