I'm building my site to include some user-identifying cookies. When a visitor chimes in, I will set a cookie with a unique visitor id (a guid) and the date-time of the visit, and save a visit record (including his user-agent, referer (if any), and so on, in my database. I plan to check each user to see if they have the cookie I've set, and then create a visit record each subsequent time they come by, to include if they click any links on my site.
The site is very very new (only about a week old as of today), but I've been tracking my visitors in a text log and I see that I can identify visiting bots by their user-agents (the Google and Bing bots/crawlers have come by, along with a couple of others).
It occurs to me that they probably won't accept cookies. Does anyone know this for sure? Or do they also collect cookies in addition to site information?