Info:

Commands:

/seekandfind [info/i] - Shows info about this plugin.
/seekandfind <help/h> [page number] - Shows all commands.
/seekandfind <join/j> <arenaname> - Join an arena.
/seekandfind <leave/l> - Leave an arena.
/seekandfind <wand/w> - Gives you the item wand, to select a new arena.
/seekandfind <create/c> <arenaname> - Creates an arena of the selected field.
/seekandfind <setwarp/sw> <warpname (eg. lobby/arena)> <arena> - Set a warp of an arena.
/seekandfind <set/s> <setting (eg. players/minplayers)> <argument (eg. amount of players)> <arenaname> - Set a setting of an arena.

You can also use /saf, /sf, /s, /h, /hs, /has instead of /seekandfind.

seekandfind.signjoin (is included in player permission.) - Needed to join with a sign.
seekandfind.sign (is included in admin permission.) - Needed to create a join sign.

To make a sign you need the seekandfind.sign permission.
Create a sign with on the first line "[SF]" and on the second line the arena name.
You also can use "leave" on the second line to create a leave sign.