digg_url = 'http://digg.com/hardware/Hands_on_Sony_X_series_slimster'; Daaaamn. We just got back from our time with the Sony X-series and it's making us rethink the entire definition of thin as the word is applied to ultra-portable laptops. See how it casually jockeys our 15-inch MacBook Pro workhorse in the pic above. Sony's X-series is so thin that it's dangerous: on one hand, it'll cut a jugular or cake with little effort. On the other, it has just enough flex to make us worry about its ruggedness. But this isn't Sony's first experiment with this form factor and the carbon-fibre fra