I thought that using the Oracle Enterprise Linux for the 11g would be a pretty cool idea.
Actually the installation experience is not different from a normal RH ES version. I would have thought that a couple of necessary packages were already included (unixODBC, libaio, etc) but I guess that this is the age-old problem of having the OS out there for some time when the software (DB) is still in development.
It would be awesome if Oracle would come up with a intermediate release of the OEL when they bring out a new version of the DB or the AS (yes I like to daydream :-)
When installing the software no issues were detected. However when I build the Database (dbca) it seemed to hang at 45%. I retried three times (sample schemas on/off). Then I left it running while I was having lunch. And guess what: it just takes a little bit longer. So when installing 11g just bring a little bit of patience with you.