I haven't seen anything on the announce list and don't see these in the repos:

qspice-client - http://rhn.redhat.com/errata/RHEA-2010-0492.html
spice-xpi - http://rhn.redhat.com/errata/RHEA-2010-0493.html
kvm - http://rhn.redhat.com/errata/RHBA-2010-0479.html

Anyone know what the story is?

You are not seeing those because they don't apply to RHEL Server.