Description of Problem: The System Overview page in RHN <https://rhn.redhat.com/network/system/system_details.pxt?sid=> should show the active kernel.
The details page *does* indeed show the running kernel if we have the information (certain versions of up2date don't supply us with that info). It should say 'unknown' if we don't have the information. If you have the latest version of up2date and this is not working for you, please let us know.