HP's got some new 2133 configs out as of tonight, including options for "downgrading" to Windows XP on models over $700 -- more or less as expected. They're up to eight base configs ranging from $500 to $820, so if you've been thinking of picking one up you've certainly got plenty of options to choose from.
[Via HP 2133 Guide]
http://www.engadget.com/2008/05/12/hps-2133-now-officially-configurable-with-xp/