Despite the small size, the UX390 should be able to run any application you throw at it. On the software side it comes installed with Vista Business, as well as Sony's in-house programs. Hardware wise there's a 1.3GHz Intel Core Solo and 1GB of RAM.
Behind the 4.5" touchscreen LCD, with a resolution of 1024x600, is a slide-out full QWERTY keyboard. Behind the screen there's a bevy of ports including USB 2.0, headphone and microphone jacks, alongside Bluetooth and EV-DO connectivity.
There aren't any external resources listed here yet.
