Here it is:yum fedora-core-1 ftp://linux.stanford.edu/pub/mirrors/fedora/linux/core/updates/1/i386
yum fedora-core-1 http://fedora.redhat.com/releases/fedora-core-1
yum updates-released http://fedora.redhat.com/updates/released/fedora-core-1
#yum updates-testing http://fedora.redhat.com/updates/testing/fedora-core-1
I was fooling around yesterday and found that stanford's mirror is non-standard. the address you list does not contain the latest releases (I didn't look around for where they are keeping them, but the list of files I got in up2date weren't available in that directory. Also you should name it something like stanford-updates or whatever will tell you which it is.
Scott