In fact for a while we would get Bing (MSN bot back then) crawl us everyday at the same time, almost on the dot.

Let me plug project honeypot (which I am in no way affiliated with). This is truly an awesome, and surprisingly accurate, free, service that does an amazing job at collecting heuristics on suspicious IP activity and exposing it in a easy to interpret way..

http://www.projecthoneypot.org/index.php