For those of you who have been hibernating all winter, the most significant tech story since Thanksgiving is IBM's sale of its Personal Computing division to Lenovo, China's largest PC maker and the most recognizable PC brand throughout much of Asia. It's a little simplistic to call it a sale; it resembles more of a joint venture than anything. Under the terms of the deal, IBM retains an 18.9 percent equity stake in Lenovo, which will make IBM-branded PCs for at least five years. And IBM will use this deal as a foot in the door to sell its servers, services, and software to the fa