The Spice project, an open source remote desktop protocol supported by Red Hat, has announced a new stable version in the 0.8.x series.  The 0.8.x releases contain the addition of smartcard (CAC) support / redirection and bugfixes.

Changes in spice-0.8.0:
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* client: exit nicely for --controller with no SPICE_XPI_SOCKET (rhbz#644292)
* client-x11: Use _exit rather then exit on X errors (rhbz#680763)
* client-x11: Fix keyb modifiers not syncing from guest to client (rhbz#679467)
* server: fix segfault on migration

Changes in spice-protocol-0.8.0:
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* Add support for different clipboards (selections) to vd_agent copy paste
* Add support for using different authentication mechanisms (just SASL for now)

You can download source tarbals for spice-0.8.0 and spice-protocol 0.8.0 here: http://spice-space.org/download.html