TiraCraft is a new SMP server that is all about survival and competition. People build bases and try to get ahead while the world is still fresh.
PvP is a big part of it so you can fight other players and start rivalries. You can also team up with others and make alliances.
The server has trading and an economy so players can deal with each other and try to become the richest. If you join early you get a real chance to shape how things go from the start.
I found a very early alpha server that is going for late medieval faction warfare with RPG progression and a real player economy.
You are not forced into one playstyle. You can go all in on faction PvP. You can do MMO style grinding. Or you can live as a trader gatherer craftsman or contractor and supply factions and build for other players.
It has custom crops and custom weapons and armor with special effects. The economy uses mixed currencies and there is a secure MMO style trade window so trading is safer. There is a main market hub called Osthaven where you spawn and trade.
Out in the wilderness players can set up temporary camps that are protected with WorldGuard. There are custom mobs that are stronger than vanilla plus boss mobs that push party based fights.
They want testers who will try mechanics find bugs spot balance issues and give honest feedback so the server can be shaped early.