I saw the Acer Aspire One with Linux Lite running in a techno shop (Currys Digital in the UK) today, I thought it was really a great-looking small laptop, and the software seemed very easy to use. Other people were interested in it too and playing on it. I am an experienced Linux user (but not an expert), and this seemed like one of those computers where everything just works without really needing to know all the ins and outs of the OS. Although if you want to learn more about Linux, look up the links the others have given, I expect you will learn much from them. Although the main interface of Linux Lite, with its full screen start up menu, is quite different to most Linux distros, except for the Asus Eee Xandros Linux, which I think they copied some ideas from.
You may also want to look at sites for the Linpus Linux Lite that the laptop uses at: