I'm using
AllVantage. I know nothing about the company, but it's very cheap. They also don't have their own software, you set up PPP to connect.
That's my problem, I've got a WinModem and I'm having issues getting connected. Not a huge issue since I'm just learning how to use linux. I still haven't figured out how to get some of my software working yet, but that's because I haven't really tried, so using Win98 to connect isn't an issue. So, if I need anything, I pull it down via the windows box and FTP it to my local server. A little pain, but not too bad.
F_M