What's your role? Network Creator (NC) or Admin?
Other Web sites or Twitter address
Tell us a bit about your network (example: Creators is a community of Ning Network Creators who gather together to collaborate, troubleshoot, and share tips and tricks)
There are only a few options that give an automatic migration path with native migration tools designed specifically for the Ning 2.0 archiver. This post might help:
Can I add a link here?"
Perrie is right .... got to have a back up plan.
If you're using an email system such as mailchimp or constant contact they will have a ready made line of code to embed on your site that captures email addresses etc. I thoroughly recommend mailchimp.