Hi Kathleen, I have certainly had experience with a presence on LinkedIn but I think it's like so many of the social networking options available it's really important to know what it is you want out of it.
I certainly haven't been effective at leveraging it for anything at all which is certainly nothing to be proud of. I just feel somewhat overwhelmed with LinkedIn, Twitter, Facebook and al the other options available for business connections.
A clear business strategy is just so important I think. perhaps I should stop writing about it and start doing something about it :-)