Mackinac Center- Non-partisan or not?

Please follow the link below to read an informative article from the NY Times on a recent request by the "non-partisan" Mackinac Center for Public Policy to make public the emails of labor studies professors at the University of Michigan, Michigan State, and Wayne State. As one professor puts it, these requests seem to be "an attempt to embarrass" labor studies professors who may or may not provide research that defends some labor groups within the state.
http://www.nytimes.com/2011/03/30/education/30professors.html?src=ISMR_HP_LO_MST_FB

The real area of interest here appears to be the Mackinac Center itself. This organization's self-proclaimed purpose is the following:
"The Mackinac Center for Public Policy is a nonpartisan research and educational institute dedicated to improving the quality of life for all Michigan citizens by promoting sound solutions to state and local policy questions. The Mackinac Center assists policy makers, scholars, business people, the media and the public by providing objective analysis of Michigan issues. The goal of all Center reports, commentaries and educational programs is to equip Michigan citizens and other decision makers to better evaluate policy options."

With that being said, however, a review of its recent blog topics include the following titles:

• Rep. O'Brien says no tax hike behind transit bill
• 'TeaParty' scores against Obamacare in several states
• Gold Standard debate tonight at Northwood
• Another way to deal with illegal strikes

The group has also been behind several questionable studies regarding the compensation perks of public employees. Calling this group non-partisan defies logic and I would really be interested to know what special interests groups are behind its rise to prominence in conservative circles over the past several years. The fact that the areas of interest for the center's research on freedom of information requests center solely on union groups, state agencies, and public employees certainly seems to betray their academic/non-partisan claims.

http://www.mackinac.org/features/search/search.aspx?