I want to chat with a native english speaker, where can I?
Well, what do you mean exactly when you say "chat"? (see What does "chat" mean)
Do you want to have a conversation with someone via Msn/Icq/WebChat or you just want to talk with someone via forum?
If you want to talk via Chat, just search with Google "english chat".
You'll find thousands of websites like EslCafe Flash™ Chat