Yes, it's true. A netbook for AmigaOS 4 will be released in Q1/Q2 2012. Price range $300-$500, AmigaOS pre-installed and included in the price.
I'm going to get one.. are you?
I've written a short entry in my blog about it. If you're interested, check it out:
Netbook for AmigaOS 4! (you better believe it!)