Yes, there are other Harry Potter worlds other than the chamber of chat. One is Pottermore.
iamharrypotter.com
It is a Harry Potter themed virtual world where you can customize your own avatar
There aren't any official RPG's however there are hundreds of ones set up by fans, try Proboards, InvisionFree, Chamber of Chat and Zetaboards.
Well there's Pottermore for a start.
give it to me now Ron. you taste so good Hermione. harder Ron
Harry Potter and the Chamber of Secrets.
Harry potter and the chamber of secrets , is the second book of the series.
Harry Potter and the Prisoner of Azkaban.
Harry Potter and the Chamber of Secrets, the second movie.
Harry Potter.
The second book of the Harry Potter series is called "Harry Potter and the Chamber of Secrets."
Harry Potter and the Chamber of Secrets is children's fantasy.