It looks like Dell was happy with their $199 Mini 9 sale from a few weeks back, because they're repeating it today.
The system is available in white, configured with
Ubuntu, a 1.6GHz Atom, 512MB of RAM and 8GB of storage (just enough to get a Hackintosh netbook running after some fiddling). Yeah, it's a barebones system that you'll want to beef up with more RAM, but it's $199. [Dell via CrunchGear]