Normally, the tree goes up on Black Friday as I watch Christmas Vacation, but as I mentioned somewhere else, I nearly broke my ankle this morning sleep-shopping. We may not get the home tree up unitl we return from WDW at this rate. I do have the travel tree out and the Fort Wilderness decorations gathered ready to pack!
(EDIT: Oops, Rob and I were simul-replying! To answer his question too, the tree comes down on New Years day as I watch When Harry Met Sally, great New Year's movie!)