Lenovo's ThinkPad X1 Carbon has been a known entity since May, when the company gave us a look at the 14-inch, Ivy Bridge-packing Ultrabook. Up until now, though, the successor to the ThinkPad X1 remained somewhat shrouded in mystery, with no pricing or specific availability information to its name. But no more -- Lenovo's just raised the official curtain on the Carbon, announcing a pricing scheme of $1,399 and up and targeting an on-sale date of August 21st at Lenovo.com. The entry-level model will run a 1.7GHz Core i5-3317U CPU with 4GB, and it includes a 128GB SSD and Intel's HD integrated graphics. Like on the ThinkPad X1, 3G connectivity will be an optional feature. Head past the break for more info on the business-centric Ultrabook.