It is not Black Friday yet, but new Windows 7 netbooks are already on sale for under $300. Walmart offers the Acer Aspire One 10.1 inch netbook in various colors for $298.
The Aspire One AOD250 Netbook on Walmart comes with Windows 7 Starter and features 10.1" LED-backlit display, 1.6GHz Intel Atom N270 processor, 1GB RAM, 160GB HDD, Webcam, Wifi, and 3-cell battery.
The 3-cell battery is the only downside of these sub $300 Windows 7 netbooks. Everything else is ok, but it's of course not the most powerful netbook configuration you can find.
Amazon also has a Blue Acer Aspire One Windows 7 Netbook for $299.99.