I'm looking for some advice please. My (yet another cms) Zope application needs to work transparently with a user management platform based on php and maybe even perl - the overall application lets customers do lots of stuff like: manage account, manage e-mail adds, domains, services, sites (cms). User information, including what level of access (role) they have per-site, is stored in a postgresql db. I think we're using Apache to set unique session ids which are stuffed into cookies/urls. Using this sessin id, my zope app needs to recognise the user without re-prompting for credentials, and know her roles. Also, any links back to the other parts of the system need to preserve the session info, but that's OT I guess. Which of the user management products fits the bill best? Or what should I read to be able to make a more educated decision? Thanks, Felix.