We know a lot of people out there who take any changes to the ThinkPad line very seriously, so it's easy to see why Lenovo didn't make any huge revisions to the T400 formula when designing the new T400s. Sure, it's slimmer, lighter, and all around sleeker than big brother, but it's still a ThinkPad, and it's still tough as nails. You might think of it as the internals of the T400 stuffed into a slightly thicker version of the X300's case -- it might not quite fit into a manila envelope, but it's still pretty easy to forget you've got it in your bag. Of course, it's hard to cut down on si
