On a commerce site we run, I've noticed 2 new entries in our log files. Both IP's are hitting a single page (one hits index, the other hits our usage policy), over and over, for the past 3 weeks. One (with a Russian address) hits every hour, at the same time. 8:02, 9:02, 10:02, etc. The other hits every 1-2 hours at different times. No referrer information, never any hits to another page.
I've checked on several search engines for specific strings of text that we use, but haven't seen them listed anywhere suspicious.