Nicely done and this would definitely be useful. Nothing is more nauseating then being forced to use Internet Exploder to interact with an ovirt/KVM SPICE console under windows.
For the plugin deployment this is definitely a point of pain. At the moment ovirt users wishing to use the SPICE Activex plugin must use an an dated version of the SPICE client packaged with the necessary SpiceX.dll. (
http://elmarco.fedorapeople.org/spice.cab)
They must also take manual steps to install and deploy the plugin on ovirt-engine server (this very painful to users). The versions of the SPICE client also made available to the community here:
http://spice-space.org/download/gtk/windows/ are also a bit dated and do not include the plugin (SpiceX.dll).
Perhaps a plugin deployment page linked from the main ovirt landing page would be a prudent way to deploy the plugin?