Apparently this next one's not new at all, but it is to me:
Mozilla/5.0 (compatible; FriendFeedBot/0.1; +Http://friendfeed.com/about/bot)
PHP info for that Host's IP [projecthoneypot.org...] shows only the 'usual' Fb UA:
- The FriendFeedBot's About page is helpful but there's nary an obvious word on-site about the company being a Fb subsidiary: "Facebook Acquires Friendfeed" (2009) [webmasterworld.com...]
- The "We crawl from the following IP addresses..." list on the About page doesn't include any Fb IPs -- they're all PSINet/Cogentco.
- The UA that hit me differed from that indicated on the site as "user agent of our crawler" ever so slightly: +Http (above) vs. +http