earthlink
I have been on Earthlink for over 5 years now, and have found them to support BOTH Mac's and peecee's. They list Mac systems in their help que, so that you get routed to a tech that knows the Mac OS and ,most times, your hardware. I think they have a time limited dialup account available, but it might have been pulled. I do know that their unlimited dial-up service includeds 8 email addresses and web pages for all 8 (10MB of space each). I have gone over to DSL with them, and have 6 email addresses (I am using all six for different things).
All in all, I have found that Earthlink's support to be excellent. When I had bad speeds (for DSL) they worked until it was fixed. I now see speeds over 1900Kb/sec (download) with most being between 1911Kb and 1940Kb (not too shabby). 😀
Update... Since I have installed my new Airport Basestation (latest model), my wireless internet speeds seem to have gone up some. I now have been getting consistant speeds of between 1970Kbps and 1980Kbps. Most showing 1974-1976Kbps.