Is domain cloaking the best way to redirect site 1: mysite.com to 'off system' site 2: mysite.ning.com and keep showing the site 1 URL address?
Cloaking is such a cheesy mechanism. It hoses up the URL in the address bar. You're better off with a legitimate redirect. It's not like people are going to be fooled that Ning is actually part of domain.
Thanks, I'll just redirect.