This is not an easy question to answer as it depends on your requirements :
<li>what Single Sign-On application will you be using (SSO or OAM) ?
<li>will you be using Single Sign-On for Forms/Reports as well or is it restricted to Oracle Portal?
I'd suggest to read through Technical Bulletin [url https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&id=1364497.1]1364497.1, 'New Direction for Oracle Fusion Middleware 11g with Single Sign-On 10g' as it will help you to decide about your SSO solution.
Keep in mind that there is no Oracle Portal 11gR2, only 11gR1 (188.8.131.52). You may need switch your Portal and Forms/Reports install in separate MIDDLEWARE homes in order to use Portal 11gR1 and Forms/Reports 11gR2.
Thank you so much for the post. We are currently using OAM but we want to get rid of it if possible due to the costs involved. Is it mandatory that we use OAM? Do Forms/Reports work with any third party Identity Management products?
By the way, we have couple of applications in Oracle Portal as well and we need to migrate them too. We can go for 11gR1 for all if it's easier. Can we do away with OAM in that case?
I'm afraid that I can't say much about Forms/Reports with third party Identity Management products. If I am right (others please correct if I am wrong), SSO in Forms/Reports is done through mod_osso protected URLs. So I would imagine that any Identity Management product which includes URL protection features, would be able to provide Single Sign-On.
Portal will be your bottleneck however as Portal relies on OID and Oracle's Single Sign-On products. Until December 2012, Application Server 10g Single Sign-On could be used. At this moment, OAM 184.108.40.206 is preferred whilst 11.1.2 is in the process of being certified for Oracle Portal 220.127.116.11. There is no way out of this I am afraid.
My recommendation would be to check whether you really need Oracle Portal as this will determine whether you will still need to keep OAM as Identity Management solution. Also check with the Oracle license department, FMW11g might come with a restricted OAM 11g license, you may not need a full license.
Do we know when Oracle Portal will be supported with Fusion Middleware R2? I am asking this question as there is some worry at our end whether Oracle Portal will be supported in future or not. We are moving to Oracle Portal 18.104.22.168 from Oracle Portal 10g and making investment. Whatever documets I have read so far convey the message that investment in Oracle Portal will be protected. Just need a confirmation or second openion on this.
Another question is that - "Is Oracle Portal 22.214.171.124 the latest software to be used for Oracle Portal?"
Oracle Portal 126.96.36.199 is the latest version. It is shipped with both FMW 11gR1 188.8.131.52 and FMW 11gR1 184.108.40.206.
Oracle will offer premier support for FMW11gR1 until June 2014. More info is available in the [url http://www.oracle.com/us/support/library/lifetime-support-middleware-069163.pdf]lifetime support policy document for FMW. The product will be in sustaining support after 2014. You will still receive support but there will be nog bug fixes anymore.