I manage around 30 separate websites currently using a proprietary CMS. I'm planning on moving all sites to wordpress platform.
These sites are chapter sites of the same national organization. Each chapter has its own site with mostly unique content and separate administrators who manage content.
We host all sites on the same server and have management access to domain dns.
I have 2 questions.
1. Should I do all separate installs or do a WPMU install?
2. I have a membership directory with a database that is separate from the CMS databases. The directory is a paid upgrade subscription service which allows member to have their own page with custom subdomains. Example. username.domain.com This is a premium service. Should I keep that database separate in the case of a WPMU install? Will the custom subdomains for users unique to a specific chapter domain be a problem with WPMU?