Hi all and many thanks for your help
I was able to generate the metadata for my custom idp following SAML2 Metadata support with JBoss Identity (http://community.jboss.org/wiki/SAML2MetadatasupportwithJBossIdentity). I placed the content of the idp-metadata in saml-entites.xml file from a seam-sp application.
Now, where do i have to place the sp-metadata in idp in order to set de circle trust between idp and sp? Is this a necessary step?. I am following the same approach that is described in http://community.jboss.org/wiki/ExternalauthenticationexampleusingOpenSSO, in "Configure seam-sp as a service provider in OpenSSO".
As you can imagine i want a seam-sp (using PicketLink Seam module) to authenticate against an idp (PicketLink idp).
Regards