Cellular Internet relayed to Wi-Fi:  "Enter a little green box, about the size of a videocassette, called the Junxion Box. It grabs a wireless cell connection and turns it into a Wi-Fi signal (it also outputs Ethernet). The result: instant high-speed network."  Applications: trade shows; client visits by consulting teams; workers at construction sites; wifi access on public transport.  Takes a PC card to adapt to different cell networks.  Cost: about $600.

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