Yeah, I'm just getting spidered like crazy. I typically serve up 3,000 pageviews a day, but my logs have been 7,000 a day or even more. The spiders are just grinding through my site non-stop: Google, Teoma, Inktomi, and some I don't recognize. Google's definitely coming by once a day.
I haven't checked to see what percentage is from Adsense, though.