Hey, i want a plugin that with a help of signs (Right-click) you could change your group to any other. bPermissions support.
I am pretty sure Master Promote does this with bPerms http://dev.bukkit.org/server-mods/MasterPromote
ServerSigns. This plugin is the best for doing this because you can write whatever you want on the sign, then, if you use groupmanger for example, you would do /svs add <server> manuadd <player> Builder (or whatever group you want them ranked up to). Also note that is the EXACT command, where it says <server> and <player> , you DO NOT FILL THOSE IN, leave them exactly as <server> and <player>
You will need to queue commands. /svs add <server> user <player> ##Selects the player /svs add <server> setgroup Builder ##Sets the group in bPermissions