Virtmgmt.msc still fails to launch under Vista SP1

After this post which served as a stop-gap to managing hyper-v guest instances with vmconnect.exe published as a TS Remote-App on a Vista box, I was hoping that I’d be able to use the virtmgmt.msc and vmconnect.exe natively from my Vista box, once patched to SP1. I’m at Vista SP1 now, but when launching the above, it still says MMC could not create the snap-in (and vmconnet.exe just fails to connect to guests). So, hopefully this gets resolved in the final release of either 2008 or Hyper-V… but no luck yet.