This worked for Fedora 14:

    # cat /etc/yum.repos.d/adobe-linux-x86_64.repo

    [adobe-linux-x86_64]
    name=Adobe Systems Incorporated
    baseurl=http://linuxdownload.adobe.com/linux/x86_64/
    enabled=1
    gpgcheck=1
    gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux

    # yum install flash-plugin