_RA_: The redhat site is dead slow, unless you are a paying customer. You need to redirect up2date to a fedora mirror site from this list:
http://fedora.redhat.com/download/mirrors.html
First, find a site that downloads at an acceptable speed. Not all mirrors were created equally in this respect, so shop around for one. Next, look in /etc/sysconfig/rhn/sources and you will find two uncommented lines:
yum fedora-core-1
http://fedora......
yum updates-released
http://fedora...
Put the
http://fedora... addresses into your web browser and you will be redirected to redhat locations. Then look at the mirror site and find the same locations. Note that the mirrors are usually organized differently than the redhat site. Now, substitute the mirror addresses for the
http://fedora... addresses.
Run up2date again and everything should go quickly.