You will have tough competition from i.e. Xobni. They are free to use, well integrated with Outlook and let you display LinkedIn info about every email address that you are dealing with. http://www.xobni.com/social-outlook
To be honest I don't see answers for those two questions on their landing page. My first feeling was that it was like more complicated version of the "connect" button in Xobni.
I just don't want them to get frozen by the First Mover Paranoia: http://blog.opportunitycloud.com/2009/12/21/stealth-disease-...