We ran a 2-node bbs out of our house.
For those too young to know what that means:
We had 2 computers networked to each other running the bulletin board - each with a separate dedicated phone line. Each line had call forwarding set up to the other, so users could dial either number, and if one of the nodes was available they could log in. And the real magic was that 2 users could actually live chat instead of just leaving messages. You haven't lived until you've played multiplayer TradeWars or LORD.