There are currently two SAML IDPs supported by the examples.
First clone the GitHub project in your local filesystem. From your command line run
$ meteor create openam
$ cd openam
After that, run
$ cp -rp meteor-accounts-saml/openam-example/* .
$ meteor add accounts-password
$ meteor add accounts-ui
$ meteor add steffo:meteor-accounts-saml
Make sure that you add/change the user in server/config.js and that initialBoot = truein the same file. This will create a local Meteor user.
The IDP configuration is reflected in the file server/lib/settings.js. Basically we only need to know the Login URL (entryPoint) and IDP's cert. Optionally, we can use the Single Logout URL.
The SP configuration can be obtained by accessing eg http://localhost:3000/_saml/metadata/forgerock provided you have a SAML provider name forgerockin your settings.js. In OpenAM, you can create an SP configuration simply by pointing OpenAM to that Metadata URL.