48 hour sale on X1 Carbon Ultrabook Laptop for $1279.20 (shipped) from Lenovo
However, if you're less impressed about aesthetics but would like to get a similar amount of processing power and general specs for a laptop which costs less, then I found the ThinkPad Edge E530 model in their promo range to be good value. You get a slightly quicker Intel Core i5 processor (2.6Ghz) with a larger 15.4 inch screen and a massive 750GB hard disk. All this for just $656.10, including shipping.
The trick is to not simply apply the ecoupon code displayed against laptop under the deals section ofLenovo's website, as it only gives you $20 off their web price. Instead, use the "10% off Levono laptops" ecoupon found on this site under vouchers. That'll bring it down by $72.90 to get the above price.