Thanks Paul - it was there and the up2date gui did list those sources where the repo files indicate that it should. I have noticed when I launch up2date I get a shield in my tray and I do get recent upgrades listed. However, when I use the up2date tray icon (right click) to check for updates, the shield does not appear. I wonder if it is actually getting through the firewall to check. System did not appear to find upgrades yesterday when lauching up2date did.
The applet is broken in FC4 - it can't handle the repomd entry properly.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=160873
If you want to check for updates, quickest way is probably to run "yum check-update" or just run up2date itself for the time being.
Paul.