I just wanted to report one thing, because I know there are a lot of Ideapad S205 users out there, that had issues running Ubuntu on their Lenovo Ideapad S205 in the past.
Lenovo Ideapad with Ubuntu 12.04 LTS: Everything works out of the box.
I just installed it and everything, including the microphone, the webcam, the WLAN, the AMD E-350 CPU/GPU and the sound worked right away. In other words: Everything works.
Even the AMD E-350 GPU works very well with the Open Source drivers and with the prop. drivers. The prop. drivers were automatically offered to me via Ubuntu itself. It works great.
A long idea, written short: I love it. It's extremly stable and very fast.
I am using the German version of the Idepad S205, combined with the 32bit version of Ubuntu. There is only one, single thing to keep in mind when installing Ubuntu on the S205: Plugin your USB/CD/DVD drive in the left USB-Port. I don't know why, but it only works with the USB-Port on the left side of the Netbook. This is only for installing Ubuntu. After it has been installed and updated successfully, all of the USB ports will work.
Oranges -> feedback on Lenovo S205 with Ubuntu 12.04 LTS.