libvirt users - Aug 2010 - RHEL 6 does not support bonded and vlan tagged interfaces for KVM guests?

I just wrote a bugzilla report against RHEL 6 beta2
(https://bugzilla.redhat.com/show_bug.cgi?id=623199).

In it I documented that I cannot get my guests to be able to use our
standard network configuration, which is active-standby bonded
interface with tagged vlans.

The response I got was this:
 RHEL Product and Program Management 2010-08-11 11:39:02 EDT
This issue has been proposed when we are only considering blocker
issues in the current Red Hat Enterprise Linux release.

** If you would still like this issue considered for the current
release, ask your support representative to file as a blocker on
your behalf. Otherwise ask that it be considered for the next
Red Hat Enterprise Linux release. **

While I am working with Red Hat to get this included in the official
release of RHEL 6, I was hoping that I could get this working somehow.
  It appears to me that the problem is in the libvert-controlled
network connection to the guest.  Can someone give me a clue on how to
get this working?

Thanks,
   David