You've only been directed here due to an error in EarthLink's DNS records. This is really on ShellTown, a subsidiary of Saugus.net.
The machine that you were trying to reach, shell1.tiac.net,
may or may not still exist within the EarthLink domain someplace. Searching
for TIAC info turned
up very little information; however it's a company they purchased some
years ago. A bit more about TIAC can be found on this TIAC discussion site.
EarthLink insists (as of Friday, June 9, in the early afternoon) that they'll have this issue fixed within twenty-four hours. We'll see.