I thought of this idea, becuase messing around in the temp server is fun (especially if you get yourself a stack of tnt)

Two days of each month, everyone gets TNT/flint and iron or whaterver you want to use to grief. There are no rules, just like a temp. During these times, the map is hosted on the server it's on now (Notch's server?) Of course, there is a back up for the map, and after the 24 hour period the server goes back to normal and the backup is restored.