There was a post about Heaven being hotter than Hell on one of my side links at some point recently. I can't remember which blog. I think the person was implying that there was something wrong with this concept as presumably Hell is supposed to be where people are being burned alive forever. But if you think of Hell as the rejection of God's love and the fire of Hell being God's love that because it is rejected, torments those in Hell forever, then in Heaven God's love must be a heck of a lot stronger because God would tone it down quite a lot for the souls in Hell, therefore Heaven would be hotter than Hell.
Related link: Would God send someone to Hell? ~ Matt Fradd