I am looking to use an open source CMS/blog site like WordPress or Drupal. I need it to work with the ASP.NET Membership I already have running my current website and community site.
I am assuming I need to muck with (hand write) some cookies to pass back and forth. So how would/have you done it? I am looking for creative ideas on how to make this happen smoothly and securely.
Drupal has a layered and pluggable authentication system, you can use that to connect to any external system for authentication.
As commentor points out below, "external system" may be a bit ambigous.
It does not have to be some XMLRPC, REST, or bus system, it can be anything, from a textfile in a directory to a table filled with legacy accounts in a "local" MySQL database. Point is, this pluggable authentication layer allows for any none Drupal-users-database-table to hook in an allow/disallow authentications/registrations.