Lenovo put its IdeaPad U300s ultrabook up for pre-order on its company online store. Soon enough, many buyers found themselves to have back-ordered it. The initial few waves of orders got December 19 as the expected shipment date, the rest will have to wait for at least another few weeks. Not only is the U300s back-ordered, but it's also that the winter break is falling in between that period. The only model available for orders is a 13.3-inch one powered by Intel Core i7 ULV processor, with up to 4 GB of memory and 256 GB of SSD storage. The fact that this $1999 model is being sold at a sweet web-price of $1499 could be driving the rush.