Proposed categories for LinkedIn Contacts (icons and descriptions of 'friend' categories, e.g. 'Trophy friend')

A while back, a friend of mine wondered about LinkedIn‘s somewhat limited options for indicating how you know someone. (“I vomited on their shoes at the office party” isn’t on the list, for example.) We had a back-and-forth on her blog, and I came up with a list of some potentially useful additions to LinkedIn’s categories.