Here are a list of popular Minecraft Servers:
- Minetown - Mining since 09/2010
- Scavenger Craft - No Whitelist! Join and have fun!
- ShadowRaze - Now updated to 1.5!
- SkyrimCraft - SkyrimCraft is a [Towny][Survival][PVP][Economy] server!
- Epic Minecrafter - Join us for the most epic Minecraft experience!
- Winds of Winter - An RPG based off "Game of Thrones"
- EpiCraft #1 Australian & International Minecraft Community
See here for a full list of Minecraft Servers.