My overview of the Digital Hotspotter Wi-Fi signal detector is in Thursday's New York TImes: I've been cadgey for a few weeks about reviewing this item because I had this piece scheduled to run in the Times's Circuits section, where it appears online now and in print tomorrow. The Digital Hotspotter is the device that I've been waiting for because it has an LCD display to let you see which networks are actually in the vicinity. It needs to add continuous scanning as an option, and I imagine they'll include more details over time. But this is the first detector that steps beyond mildly useful into thoroughly useful when trying to see what networks are around you for connecting or troubleshooting.