netmeg - 5:10 pm on Mar 7, 2012 (gmt 0)
Mine are going back and forth between 100 visits an hour to 500 visits an hour. It had slowed down some (we've put in a few things to block stuff like non English browsers - the site is pretty tightly targeted to US traffic) but now today it looks like it's picking up again.
For me goes on all hours of the day and night. In the wee small hours where, this time of year, I have NO traffic on this site, it's still going.
It's a slow drip, my real time analytics will usually show anywhere from 1-10 of these bot visits on the site simultaneously. Occasionally as much as five minutes goes by without one, but then they come back in a burst.
They *do* repeat - some of them have come back as many as 6 or 10 times.
I am keeping all my logfiles around (I do anyway) and if you think you are being hit by this, you might do the same. At some point maybe we can find a way to compare notes, or see if we're all being hit by the same IPs.