Currently running WindowBlinds, ObjectDock Plus (with working Start menu), CursorFX Plus, RightClick, Desktop X, Fences, and Deskscapes on Vista Ultimate x64. No conflicts.
ObjectDock used to have systray functionality on x64, but the most recent update blew it away. They say I can uninstall OD+ and reinstall to get it back, but I don't feel like going through the hassle.