I was a CP September 2000 - January 2001.
Contact other CPs? As in, before going to FL? I have no idea about that. When you get there though, it's easy to meet people! I met my DH by wandering into his apartment the first night we were all there!
I was in merchandising, and it was cool. Not the best job in the World, but not the worst. And I don't think once you are assigned to a category, it's something you can change.
I actually really liked my job, I worked near the Main Entrance at the Studios and got to do different things like Oscar's, hotel delivery, package pickup, and merchandise shops.
Personally, I roomed with a larger group, lived at Vista Way with 5 other roommates. I chose that mainly because of the $$$, it was cheaper. And I came from living in a sorority house, so living with more people didn't bother me at all.
I only had the basic Disney Management seminar. They only had a couple of choices when I went, and I did the basic one.
Hope that helps! And if you have any other questions, I'd be happy to help as well.