My employer runs two ISPs, CLEARnet and Paradise. Neither of them "officially" support linux, although both have customers that use linux and I have used linux with both, without problems.
At one time, my wife's win 98 couldn't connect to clearnet but my linux box could. Same dial-up number, same username and password. Never worked out why and it has worked again since then. AFAIK, none of the "big" ISPs "support" linux, but a few local ISPs run by hobbyists do. IIRC a member of the CLUG runs an ISP. Most ISPs have two levels have "help desk", there's the non-techie staff who sign people up and deal with standard problems (windows only), and the techie staff who deal with non trivial problems and may or may not help with linux (YMMV). If you strike a help desk operator who says "sorry we don't support that" you've probably reached the first level. The techies are either geeks you'd love to help a linux user, or an MCSE type who will give the same reply as the first level operators. Yuri
