Here's a bot you'll most likely want to block:
7/8/2008 12:45 184.108.40.206 PHP version tracker (http://www.nexen.net/phpversion/bot.php)
It scans servers it has no business scanning for software they are not running. It doesn't obey robots.txt and I've had a lot of other traffic from this network that was highly questionable.
Le Groupe Videotron Ltee VL-17BL (NET-70-80-0-0-1)
220.127.116.11 - 18.104.22.168
Videotron Ltee VL-D-MO-46523300 (NET-70-82-51-0-1)
22.214.171.124 - 126.96.36.199