If the diminutive UMPC D4 intrigued you and you want to have one for your self. You can pre-order it now on GeekStuff4U for $1526.33 and it will ship on June 20th. The D4 comes with Centrino Atom Z520 1.33GHz processor, 40GB HDD, 1Gb RAM, 5” touchscreen (1024 X 600), integrated video, 802.11 b/g, Bluetooth, 1 USB mini, microSD slot and slide out keyboard. The D4 will have full version of Windows Vista Home Premium on it and I am not very sure that a 1.33GHz processor and only 768MB RAM (254MB is used by VRAM) will be able to run Vista efficiently. Anyway the D4 is one of the smallest full-fledged Vista computer and that alone will compel many to buy one.