I went to www.fedoranews.org yesterday and found several helpful tutorials. I used the tutorial about fedora mirrors to modify my yum and up2date configuration to use different mirrors. I initially changed it to a mirror located at Miami University(Ohio) and had a problem with the released updates section. The error messages were very cryptic so I figured out the guilty party by guessing. I got it to work with mirrors in California and left it there. I tested it by installing the Flash-plugin.