Why close MP? It can just run in the BG and then you don't have to wait for it to reload.
I am choosing to close MP because with Windows 7 64bit and MediaPortal 1.1.0 when running in background/minimized does not seem to regain focus after Hulu or another program is closed, also my experience with media portal in the past was MediPortal never handled losing focus well, results in video tearing/shuttering. With my system it takes about 5 seconds for MP to load using StreamedMP skin with Moving Pictures also installed and using the normal loading screen and not the alternative, so this reload really does not bother me.
So for those that don't mind the reload of MP, this will be available.