See:
Sadly, going the way of the dodo's. Sometimes also known as fight-o-net.
More can be found on MeatballWiki at http://usemod.com/cgi-bin/mb.pl?FidoNet.
Actually, FidoNet is still popular (and still growing) in Russia. Unlike InterNet, it doesn't cost anything, and this is one of the reasons why young geeks like it. However, FidoNet was much better a couple of years ago than it is now. -- DmitryJemerov
FidoNet was ALWAYS much better a couple of years ago. That's one of the constants of the Universe.