There are a few ways to find out about the new releases while at WDW. Most are not very reliable.
You can:
1) Ask a CM I know for a fact that this is the worst way to find out anything because I think they get a kick of messing with our minds.
I found out about the Christopher Robin 1000 LE at the pin meet. I traded for it and then went to pick my son up at Disneyquest. There were tons of them left so of course I bought 2. The CM told me they were releasing a new 1000 Le every day for the next three days at West Side. So of course I went to West side and hung out at the pin cart every day, Sat and Sun. No other LE Mystery pins. joke on me.
2) Ask other pin traders. I try this every trip. Sometimes I get lucky, sometimes they know about as much as I do.
3) find a computer and check out these boards or the other two with updated news. You may be warned the night before of an impending release.
4) THIS IS THE MOST RELIABLE METHOD OF FINDING OUT WHAT IS NEW.
Hunt around for Kathryn or Raul and ask them. I know Raul is often concentrating on other things so he is not really the best source (*He seems to prefer the UK flag) but Kathryn might know something.
5) THIS IS THE LEAST RELIABLE METHOD Get to a pin cart early and if they have a rope set up near it stand in the roped off area. You might be there for a long time but eventually something will be released. Be forwarned, they set up the rope for the pin trade parade on thursday night, I got hungry on Friday evening so I left.
* Raul spotted a really well shaped blonde with the tightest jeans invented. Her shirt was the UK flag. He kept running over to her pledging allegiance to the Queen and singing God save the Queen. He was prominsing gold skirts, and many pins,We had to drag him away. It wasn't pretty. Peggie