I never use LinkedIn other than to accommodate those that I know who want me to be part of their network.  Several times a week I get requests to be "LinkedIN" with a colleague or acquaintance.  I always try to comply.  Many times, however, when I click on the link to accept the invitation I find that I am taken to the wrong page at LinkedIn.  I am not sure if this happens to other users, but this happens to me most times.  I find this very frustrating and this frustration further blurs my already jaundiced view about the value of social networking sites (for making money).  I might add that when I receive an invitation from a Facebook member (again as an accommodation) the interface for acceptance works cleanly and rapidly (regardless I still say Facebook will never be hugely profitable). 

Turning to my Kindle from Amazon:  I had a small technical glitch tonight.  I called the Kindle help line at Amazon.  I was blown away once again by the Amazon customer service.  I was prepared to wait for many minutes or more for a rep to get to the phone.  My waiting time was less than 10 seconds!  Amazing Amazon does it again.