I've seen a couple of requests for Oracle 11g R2 - it was released last November so we missed it for 5.0 GA.
As 4.2 is approaching Maintenance mode makes sense to certify 4.2 as well.
For EAP 5.0 we need to certify RAC as well (as we do for 11g R2).
In summary, we need to add :
EAP 5.0.1 - 11g R2 + 11g R2 RAC
EAP 4.2.9 - 11g R2
EAP 4.3.8 - 11g R2