A few more things the server does that are worth knowing about.
The server has a live 3D map you can view in any browser — no Minecraft required. See every world from above, watch players move around in real time, and zoom in on any build you're curious about.
You can also pin your own locations from in-game: /bluemap marker — great for marking your base or a cool build so others can find it.
/nick <name> — set your nickname/nick off — go back to your real username
/msg.
/mail send <player> <message> — send a message/mail read — read your inbox/mail clear — clear your inbox
Group up with friends in a party to share XP while you play together. The more active party members, the bigger the bonus — up to 2× XP in a full group.
Party chat (/pc) keeps your group's messages private from other players. Higher-level parties unlock teleporting to party members and item sharing.
/party create <name> Start a new party/party invite <player> Invite someone to your party/party join <player> Accept a party invitation/party quit Leave your current party/pc <message> Send a message only your party can see/party teleport <player> Teleport to a party member (higher level)
/afk Mark yourself as away from keyboard/list See who is currently online/getpos Show your current coordinates/time Check the current in-game time/msg <player> <text> Send a private message/r <text> Quick-reply to the last private message