Well, I would expect those mostly in military / govt satellites (even those with more benign overt goals such as the GPS constellation). Sounds a bit less likel

Well, I would expect those mostly in military / govt satellites (even those with more benign overt goals such as the GPS constellation). Sounds a bit less likely that they would sneak military hardware (specially weapons) on comercial satellites owned by a private corporation (i.e. Iridium Communications) and likely not designed to function in an adversarial environment. I mean, it is a VA based company, so it is possible, but would not be my first bet. Lacking ground tracking when the satellites are deployed almost a half-orbit away from the launch site seems perfectly plausible to me.