<cfif CGI.Http_User_Agent CONTAINS "googlebot">
<cfmail from="info@yoursite.com" to="you@yoursite.com" subject="The Googlebot came to call" server="smtp.mailserver.com">
Google has visited #CGI.Script_Name#
</cfmail>
</cfif>
Put this in your application.cfm file in the root of your site. Then every page it visits you get an email, be sure to change the following code to yours;
info@yoursite.com = your email
you@yoursite.com = your email
smtp.mailserver.com = your mail server ex. mail.yourdomain.com
You can even change the script to alert you to other visits by other spiders, all you need is a list of other bots!
Try this list;
http://www.robotstxt.org/wc/active/html/