Maybe a little late here, but where does the assumption come from that the modem on usb must be a broadband one
of the cable or dsl type.
In my case, I am stuck on dial up, and if you want to set up ICS with dial up, a router is just a start in the expenses because you need an expensive and now hard to find dial up modem that plugs into the router. But if you have two computers running XP or vista, both with built in net works ports, just one dial up modem, you can be ICS networked for the cost of a crossover cable. In my case $18.00 for a sixty foot one. While I am waiting and waiting and waiting to get dsl availability from AT&T. And since I have zero need to ever network more than two computers, what do I need a router for?