My dad had this issue. He had to stay in a recovery center for a month and while he had his laptop, there was no internet there. Verizon had some plan for such things with a broadband card rental for that time. It was only a few hundred bucks.
I'm on a business trip this month and staying in a rental that does NOT have a landline phone or internet access , I'm a mac powerbook user and will need internet for 3-4weeks only- ANY suggestions??