What a strange system. At their peak, we had around 15,000 users on 15 SparcStation20's running SunOS4 (which I don't think were ever upgraded for 10 years). Providing dialup, unix shell access, mail, usenet news and fabulous lynx web-browsing. They got bought out by Mindspring, which was bought out by Earthlink and then shell access was discontinued on 30 Sep 2000.
I scanned in the letter of introduction and the cover of the user guide.
If you have other links or more info that would fit in here, send me email at email@example.com
Lots of old netcom people still talk on usenet, find them at alt.netcom.emeritus