Whats new in RHEL 5?
 

I was going through RHEL 5 Book And All I collected it is different from the previous RHEl 4 in:
1. Virtualization ( Xen)
2.Serious Storage
3. Easy SE-Linux
4. Better Application Server Functionality
5. linux Audit System

IS there Anything I am missing?
Can anyone Tell me about New Auditing System?

Doesn't the RHEL 5 Book have that information about the Auditing System?

As for the changes: a list of 5 items might appear as short, but each of the listed topics covers extremely complex IT issues, so it is not a short list at all. If you are looking for exiting flashy changes, then rather switch to Fedora or Ubuntu with all their eye-candy.