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The ASUS Eee PC and the netbook revolution
(www.spacebar.news)
This is a most excellent place for technology news and articles.
It's a very popular and user friendly distro, often recommended for beginners.
But it's not just a beginner distro, it is also very versatile/powerful and well supported. So it can be used just as well by experienced power users.
The reasons to use other distros is not so much about what you can do, but more about how it is done.