This is just a great interactive Christmas card from ad agency Wieden + Kennedy London. Based on a green initiative you can name your own tree, plant it and pump three buckets of water into it (don't give up even though you're almost ready to). At that point you can start decorating it with the tons of different ornaments you can see on the screen capture. The catch...to add more ornaments and lights you have to grow it by returning every day to water your tree at which point your entry will get bigger. Mine, no surprise, is scottstree. I started out traditional but I have great plans. The counter shows how many people have planted trees in what ultimately should become an intriguing forest (competitive one too, given the sites's sponsors).
Good stuff. Check it out and let me know what you think.