As of 2010-06-25 Fedora 11 has reached its end of life for updates.  As planned, last update pushes to Fedora 11 were made in advance[1] of this date. No further updates, including security updates, will be available for Fedora 11. Fedora 12 will continue to receive updates until approximately one month after the release of Fedora 14.  The maintenance schedule of Fedora releases is documented on the Fedora Project wiki.[2]

[1] http://lists.fedoraproject.org/pipermail/devel/2010-June/137849.html
[2] https://fedoraproject.org/wiki/Fedora_Release_Life_Cycle#Maintenance_Schedule