The Hannspree SN22A1 all-in-one computer might just replace your desktop. It packs in a 21.5-inch multitouch display that uses a LED backlight for power efficiency. It is powered by a 1.66GHz Intel dual-core D510 processor, 3GB of DDRII RAM, a 320GB HDD, an integrated optical drive, a memory card reader, four USB ports and Microsoft Windows Home Premium is running the show.

Some other specs include Wi-Fi, Bluetooth and an integrated 1.3MP webcam. The Hannspree SN22A1 all-in-one PC is available for £349.99 or $574.

Officially unveiled today in the UK, Samsung’s new 23-inch U250 and 20-inch U200 all-in-one PCs are going the multitouch route. The U250 offers full 1080p resolution, while the U200 offers 1,600 x 900. Both ship with Windows 7 Home Premium.

These machines are Samsung’s first venture into the home PC market in the UK. So you would think we would have a decent specification sheet, but oh well. They’ll ship later this month for those who want them.

Lenovo is apparently trying to corner the market on all-in-one computers and has been releasing several of the machines over the last few weeks. Today Lenovo has announced a new AIO machine called the ThinkCentre A70z. Lenovo touts that the machine can start up in 35 seconds and shut down 40% faster than rival systems.

If you are in a hurry to get out the door on a Friday fast shut down is a nice feature. The machine sells for $499. For that, much loot you get a 19-inch screen holding the CPU, RAM, storage and all that jazz. The machine can support up to 500GB of storage.

Shuttle is well known in the small form factor market and is becoming increasingly known for producing some cool all-in-one computers as well. Shuttle made its name producing barebones small form factor systems that appealed to gamers looking for a desktop computer that was easy to take to and from a LAN party.

Shuttle unveiled a slick new all-in-one computer today called the X500V that will make fans of open source operating systems happy. The machine is called the X50 All-in-One PC and ships with openSUSE Linux preinstalled.

Asus recently announced their upcoming all-in-one PC, the Eee Top ET2002T, for the European market. The system gives you a 20-inch touchscreen display with 1600 x 900 resolution, an Intel Atom 330 dual core CPU, an NVIDIA ION graphics card.

Some other features include 2GB of RAM, a 250GB hard drive, a DVD burner and an HDMI input. The ET2002T will go be available in Europe in a few short weeks for €598 ($846).