Well I have the latest Windows Gizmo beta (4.0 v319) working on a couple Vista Ultimate machines and can connect with the N800 just fine. (video, audio, etc) The only think I've found wierd (on both the Windows client and N800) is the Gizmo bandwidth test/measurement. It always shows <220kbps for me even though I'm on connections that measure much faster then that for outbound/inbound.