Hi, It been a while since 05-09-2013 08:40 PM when you asked about
"where I can find a couples poseball script? One person sit on a poseball, the other person sit on another, then animation syncs and starts? It's used like everywhere in SL, but I can't find a script for this anywhere that actually works."
But the answer is ! https://marketplace.secondlife.com/p/Couples-Dance-Dot/6621164
this will do everything you want. Have fun.