There is a fabulous holiday build on the HPMD sim at 1000m. This is a must-see! It may take some patience for things to rez, but it is absolutely worth the wait.
"Secret Party" brings to mind the magic of Christmas in childhood. It is charming and sweet. Can you find the secret party?
"Goofy Santa" features a snow santa, apples, and flying piggies. You can fly along with the pigs, too... talk about a holiday trip!
"Yule Log" is truly a vision of exuisite holiday loveliness. (And the bunnies are friendly, too.)