In a few days, I'm going to have a commercial I taped on DVCAM output(ed?) to BetaSP. I just wanted to know if there was anything I needed to know, other than to make sure they copy it from a deck that adds setup.

Yes, insure that they record the audio at near analog max otherwise your commercial will have a low volume.

Have you checked with the local station/cable operator. Sometimes they will do the transfer for you as Comcast does for me.