We found out last time at 16 weeks and had her name picked out within half an hour of finding out. I loved knowning who it was in there : ) I'd definitely find out again.
We told our families that we knew but weren't telling, and it was awful, they were really offended. This time, to be honest, I wouldn't care who knew what; I'd be much less precious about the whole thing. People can have as much or as little information as they like, I'll still be happy : )