Thank you both for your replies. Bill, to clarify - I'm on a temporary long-term stay with family but am not planning to stay here; it would be nice to have an ISP with good coverage so I wouldn't have to change again later. This is a suburban area and most of the neighbors seem to have cable-type connections rather than wireless; my laptop's WIFI card picks up some of them. I don't know much about how those work - I went straight from dialup to a wireless modem - but I think they mostly come with extra services, like phone or television, which I don't need. I have to admit, I don't know many people here; I don't have a car so I don't get out much, and because I'm self-employed I don't have any coworkers to ask. And I do know that I'd have to buy another modem; I've had prepaid plans for internet and also my phone for many years.
Wcjeep, I've never heard of Republic; I'll look into them. I don't know what a Motox is but hopefully their site will explain.
EDIT: I just went to Republic's site. It looks like they have only wireless phones. I don't need a phone, I need a wireless modem for my computer; that's the way I access the internet.