Wired News reports on WanderPort, a company developing a mobile Wi-Fi hotspot solution: The end product will be a small trailer with a diesel generator, an antenna, an AP, and satellite dish for backhaul. Users would be anyone who needs remote and probably temporary connectivity, such as disaster relief organizations.
Another temporary hotspot solution designed for less remote applications is available from Junxion. The Junxion box allows users to insert a PCMCIA card that enables backhaul over the cellular networks. Wi-Fi distributes that bandwidth to nearby users.