I have a network of sites which are content interlinked. ie if you place an ad on one it appears in some of the others. They all run off different domains and some are hosted on other servers. What I need is a solution which allows users to log into one site and then automatically be logged into others when they visit. I also need to manage the users personal data etc with the ability to ban users, manage email lists, that sort of thing. Basically a single sign on (SSO).
So far I am looking at 3 options.
1. Build my own
3. LASSO http://lasso.entrouvert.org/
I did read this article here http://www.dynamicalsoftware.com/news/?p=18
which is leading me to option 1 but I am lazy so looking for an existing solution.