Anybody know much about free over the air HD? We have satellite and I don't have any interest in paying extra for HD channels when the only shows I really watch are on network tv, abc, nbc, cbs, fox. Apparently I should be able to go out and buy some sort of antenna that picks up HD signals, but I never really hear much about this. Most everyone has satellite or cable and just pays extra for HD. But free HD just sounds good to me.