The Holiday Giveaway that went on for over 5 weeks on the official site, is over. Yesterday Maxis posted the final download, a Mistletoe. Let your Sims stand under it, and they'll have to kiss. You can download the 1.37 Mb object from this page on the exchange. For an overview of all other downloads that Maxis gave the past couple of weeks, go to the Holiday Giveaway page. The Mistletoe will probably be added to that page soon enough as well.