I uninstalled my Nucleus X2i last week. No more flashing lights.
I have returned both of mine. (I never got to install the second one in my wife's 2005 H2).
Does anyone know when the GM PAL (Personal Audio Link) is coming out? They made a big announcement in August 2006, but I haven't seen or heard a word since.
The other option is to see if the Peripheral Electronics unit is "identical" or just similar, but I don't think I have the stomach for it.