Will need to read this thread more. But am thinking portable QRP with a small netbook/ tablet to run some good JT65, or maybe some CW applications for the morse code challenged like I am. Am also thinking small antenna for inside apartments, that can be used mobile/portable/pedestrian. Wish there was more QRP development of small inside apartment antenna solutions (ceiling or wall mounted antenna, or low profile single frequency magnetic loop). Yes its hard but not impossible to work inside an apartment. Windows and wooden roofs can be permeable to RF.