Bukkit

The 0.6.5 release introduces the following additional mechanisms for managing permissions for a dungeon:

/addDefaultDungeonPermission (or /db perms add)
/removeDefaultDungeonPermission (or /db perms remove)
/clearDefaultDungeonPermissions (or /db perms clear)
/listDefaultDungeonPermissions (or /db perms list)

Using these commands you can manage the default permissions that are granted to any player in the dungeon. The nodes that apply in this case are the following:

dungeonbuilder.blocks.placetype.*
dungeonbuilder.blocks.breaktype.*

Meaning if you type:

/addDefaultDungeonPermission testdungeon dungeonbuilder.blocks.placetype.DIRT

Then any player who enters the dungeon can place dirt blocks by default.