I just talked to one of the ISPs and they said they dont mind if I use a router to share the connection! I dont know about the other ISPs...is there a way they can know that I am using one? (the sub IPs or something?)
They said they dont allow more than 1 log in at the same time (just like dialup) but in the case of a router, it wont be like someone is logged in twice right? Its would be like only 1 person is logged...