I know of nothing that can station keep for 8-10 days, particularly the combat Skysat the Air Force Battle Lab experimented with a few years ago - It was a throw away balloon system that, I suppose, could remain aloft 8-10 days, but not maintain station over a particular zip code.
defenseindustrydaily.com/combat-skysat-cheap-nearspace-communications-relay-at-jefx-06-02210/
Please point me to the specs for the Skysat system Sanswire is involved with. I haven't been able to ascertain whether or not it is a continuation of the original DoD initiative. Nobody replied last time I asked (when Skysat news first hit the GTEM board).
Thanks,
Sky