I had the same problem, I went back to my latest working restore point  and start reading the instructions on the download site (http://www.microsoft.com/downloads/details.aspx?FamilyID=c87e257c-d76f-4785-a09b-af36babd6e32&displaylang=en).

There is stated that you first need to disable the current Outlook Social Connector deliverd with the Office 2010 Beta. When this option is disabled then you are ready to install the OSC.MSI and after that the Linkedinoutlookconnecter.exe. Following this made it work for me.