Most things deserve a second chance, right? Hey, if they promise improvement, we think so, and that's exactly what we're giving Lenovo's ThinkPad X120e. If you recall, the previous X100e was quite a disappointment, and that's actually putting it rather nicely -- not only did the 11.6-inch system redefine the term "lapburner," but it struggled to last 3.5 hours on a charge. It was bordering on trag