joined:Nov 5, 2005
Bare (no rDNS) IP belongs to the LinkedIn corporate mothership:
LinkedInBot/1.0 (compatible; Mozilla/5.0; Jakarta Commons-HttpClient/3.1 +http
Again part of a Twitter storm but unlike prior visit(s) when it was Host-named. [webmasterworld.com
...] Still no direct linked-in connection on/to the site hit.