I have an interesting challenge. Basically, several computers sharing the same 3G internet connection. Some background needed to see what I have to work with: I am at a location where there is no fixed line - neither phone nor cable TV. Only internet connection is via mobile / 3G. Some friends and I want to pitch in and buy a 3G modem (most likely USB), and share the connection. One subscription with a high limit is much cheaper than several subscriptions with low limits. Plus, reception at ground is poor. I'll have to fix the 3G unit on a mast, and probably run it down to a router / computer with a USB extension cord. The connection should be shared via my Airport Extreme, but other routers also possible. Thus, wifi. Much like at a wifi hotspot. Of course, several users should be able to surf at the same time. We should be able, for all the users, to monitor bandwith and data usage. Perhaps also limit it. Some possible configurations: 3G USB modem - connected directly to the Airport Express. Postings in other forums say this will not work. 3G USB modem > mac mini (or other computer) via ethernet > airport extreme WAN port. I guess the mac mini would need to run hotspot software? Anyone out there done something like that? Input would be greatly appreciated.