BetaBuddies is a Minecraft Beta 1.7.3 SMP server that is all about the classic vanilla feel. It is for people who miss old Minecraft and want to build a world together.
The server is small but active and it is whitelisted. You have to share your Minecraft username and then wait for manual whitelisting so it can take a bit.
They focus a lot on being friendly and respectful. No hate speech. No griefing. No stealing. No cheating or exploits. No trying to lag the server. Be kind and respect other peoples builds.
