A guy, called “anh”, over at mictopctalk.com has modded the Sony VAIO UX490N UMPC into a device that does almost everything. The original Core 2 Solo U220 1.2GHz processor has been replaced by a more powerful Intel Core 2 Duo U7700 1.33GHz processor overclocked to 1.438GHz; a 128GB RunCore Pro IV SSD replaced the original 48GB SSD, and the Intel 3945ABG WiFi card has been swapped for the wireless-N capable Intel 4965AGN card.

TrsutedReviews has a review on the Sony Vaio VGN-UX1XN UMPC. The Sony Vaio VGN-UX1XN is powered by an Intel Core Solo U1500 / 1.33 GHz ULV processor, 1GB of RAM, and 32GB Solid State Drive.

The Vaio VGN-UX1XN Micro PC has a 4.5-inch TFT LCD display with 1024×600 resolution, WiFi 802.11g, Bluetooth and integrated Fingerprint Reader.

TrustedReviews says:
The UX1XN is certainly a highly desirable thing. Getting Vista to run in an acceptable fashion on a device this small is a feat in itself, but its impressive, notebook-like specification and decent battery life, coupled with very compact dimensions and light weight make it a much less intrusive companion than most full-blown laptops.

LaptopMag has a reivew on the  Sony VAIO UX VGN-UX390N Premium UMPC. The VAIO UX VGN-UX390N is powered by an Intel Core Solo U1500 1.33GHz processor, 1GB RAM, NO hard drive but 32GB Flash, integrated Intel GMA950 graphics. It has also a 4.5-inch …

Sony announced its Vaio UX UMPC wihout harddisk drive but 32GB Flash Drive, the VGN-UX91NS and UX91S. They are powered by an Intel Core Solo U1500 1.33GHz or Core Solo U1400 1.2GHz or Celeron M 1.2GHz processor, 1GB of RAM, 32GB Flash Drive. The new Vaio UX series runs Windows Vista and comes with Microsoft Office 2007 and it has a 4.5-inch LCD touch-screen and a webcam. There are BlueBlack and Blue version available.

There is also a silver version which has similar config but it comes with ordinary Hard Disk Drive in 30GB or 40GB capacity instead of Flash Drive.

Watch the preview video from Thoughfix at CES 2007.