A well known person Fredrik Heffermehl
has claimed ever since 1948 when the committee was selected with partisan and NATO shadow, about 45% of the awards are against the award's will. And of course, he has specific comment about Liu: http://news.xinhuanet.com/english2010/china/2010-10/13/c_13555517.htm
Similar piece also appeared on blog-sphere: http://cgi.stanford.edu/group/wais/cgi-bin/?p=52351
In addition, a professor has commentted against Nobel Peace 2010 (from XinHua though, USA daily and google news have links to it), the report in chinese is all over the place:
http://news.xinhuanet.com/english2010/china/2010-10/13/c_13555559.htm
There are more, this one is long but very thorough and interesting: