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71.41.200.* "MLBot (www.metadatalabs.com)"
I've seen it attempt to hit my site from a couple of IPs in that block almost daily since 3/1/08 and they're crawling from a RoadRunner business connection so they probably aren't crawling too far or too fast at that speed.
What I find most amusing is it already knew about pages on my site which they've never been allowed to crawl.