A few days ago, Larry Hryb (Major Nelson) said on NeoGAF that the "Xbone" nickname was disrespectful to the team behind the Xbox One's development. Surprisingly, Microsoft actually secured the Xbone.com domain 2 days ago.
However, the Xbone.com domain isn't recent at all as it was created back in 2000, and at the moment, Xbone.com redirects to a Bing search result page for "Xbone". The Xbone nickname emerged shortly after the Xbox One's announcement, with the console also being branded the Xbox One-Eighty due to Microsoft's multiple U-turns on the console.
The Xbox One will be released on the 22nd of November in 13 countries, arriving at rest of the world in 2014.