Features currently:

    Players can be assigned to ranks either via the GUI or via chat commands (!setrank)

    Kit management GUI (Kits can also be assigned to ranks)

    MCAdmin acts like a tunnel for all clients, thus able to block hax/exploits before they reach the server (currently names with invalid chars) [This means you got to allow MCAdmin in your firewall now, not java.exe!]

    Current chat commands: !kit, !who, !give, !kick, !ban, !unban, !setrank, !commands, !tp, !summon

    Automatic update-checker for minecraft_server.jar as well as MCAdmin itself

    !give supports giving items by names (i.e. !give cobblestone)

    Only advbuilders and up can spawn TNT, lava and make fire (water can only be spawned by builders and up)
    Furnaces are working now

    Memory stuff changeable via GUI (-Xmx and -Xms parameters)