RHEL is essentially just another linux, with officially backed support for use in a production environment. It should work now... but I noticed there was another poster that had issues with it also.
What kernel is it running? Did the module load without errors, and is there anything useful in the log, /var/log/XFree86.0.log?
Posting configs + logs is useful. If you're certain you've not made errors in those areas (and its a specific issue), better drop some analysis so peeps can help you figure it out. There will apparently be no driver release in the near future.
"..the triumph of evil is for good men to do nothing."
VIDIA video driver RPMs for Fedora
:: see yum repo at livna.org