One minor issue in the new beta is that the IDE driver is still loaded by default in all kernels. Many of my production servers do not have any IDE adapters or any IDE adapters that are in use and the inclusion of the driver compiled-in is unnecessary bloat. RedHat already handles this situation exceptionally well for SCSI devices with its "mkinitrd" script and other assorted oddments, it seems natural to do this for IDE as well. Earlier releases of RedHat would have needed to have this functionality compiled in as kernels 2.0 and below did not support loading IDE as a module. As of Linux 2.2 however, this is no longer an issue.
We've been considering changing this, but aren't doing so for this next release.