Some people have soft spots for puppies and panda bears; we have them for tiny laptops. Claiming to be the world's smallest computer, USmart's 4.8-inch MC-1 is about the size of a man's wallet yet manages to pack the guts of a netbook. That's right in that tiny little chassis is a 1.6GHz Intel Atom Z530 CPU, 1GB of RAM and 4GB of on-board storage. What it doesn't have is some sort of fan; when we put the little guy in our hand it was quite toasty. Wondering how in the world one would navigate Windows XP on such a small screen? Like the 4.8-inch UMID MBook BZ, it has a resistive touchscreen and comes with a stylus, but USmart will also sell an external touchpad / keyboard combo that's bound to