[update] trackbacks/pingbacks temporarily disabled. Waaay too much spam. Seriously.
From their updated user agreement:
License and warranty for your submissions to LinkedIn.
You own the information you provide LinkedIn under this Agreement, and may request its deletion at any time, unless you have shared information or content with others and they have not deleted it, or it was copied or stored by other users. Additionally, you grant LinkedIn a nonexclusive, irrevocable, worldwide, perpetual, unlimited, assignable, sublicenseable, fully paid up and royalty-free right to us to copy, prepare derivative works of, improve, distribute, publish, remove, retain, add, process, analyze, use and commercialize, in any way now known or in the future discovered, any information you provide, directly or indirectly to LinkedIn, including but not limited to any user generated content, ideas, concepts, techniques or data to the services, you submit to LinkedIn, without any further consent, notice and/or compensation to you or to any third parties. Any information you submit to us is at your own risk of loss as noted in Sections 2 and 3 of this Agreement.
They own you … or at least anything you say or can be linked to you saying.