Although I really want to try myself, time is not favor to me now.
Our forum member adktk has installed Window 7 (beta) in U2010 and expressed much faster than the Vista and even the imperfect XP U2010 (incomplete drivers....)
adktk mentioned the Chinese input panel is perfect and all Vista drives are applicable in Windows 7.
Screen rotate, volume control and even his modded HSDPA module are functioned perfectly!!