Christian Universalists believe that God is all-loving, all-powerful and ultimately way too nice to let folks suffer in Hell for all eternity. Plus, you can throw in some metaphysics about how we're all sort of pieces of God and therefore inseparable from him/her in the long run.
But that doesn't mean evildoers are off the hook. There may not any ignum eternum on the menu, but there's still ignum enough to burn away your sins. Only then do you get to rejoin the divine in the afterlife.
So this Hell functions as a sort of cleansing purgatory.